Below is a short list of how the Buddhist swastika is represented in its scriptural context as found in the Nikayas.

Atta’dhi’no…… sotthina’
[DN 1.73] Master of the Soul………finds sanctuary (sotthi).

Sotthina’…… paralokam.
[DN 2.346] Sanctuary (sotthi)………the other world.

sotthimatta’nam.
[MN 1.403] Made sanctuary (sotthi) for the Soul.

bahuka’ro kho  me  ayam.  kullo;  ima’ham.  kullam.  nissa’ya  hatthehi  ca  pa’dehi  ca  va’yamama’no  sotthina’pa’ram. uttin.n.o.
[MN 1.135] This raft (Dhamma) has brought me to fulfillment. Depending upon this raft and striving by hand and foot I have crossed into sanctuary (sotthi) upon the further shore.

na  tveva  bhavantam.  Gotamam.  A’sajja  siya’  purisassa  sotthibha’vo
[MN 1.236] One could never assualt the entity Gotama and become sanctuary (sotthi).

Sotthina’ abhinibbhijjitum.
[MN 1.104/MN 1.357] Sancutary (sotthi) in (ultimate) rebirth into purity.

sotthiyo kinti vuccati…. abhiñña’ vosito muni, cittam. visuddham. ja’na’ti
[MN 2.144] what is sanctuary (sotthi)?…a sage with transcendental gnosis, knowing ones consciousness is purified.

Sotthina’ pa’ram. gaccheyya, tinno pa’rangato
[SN 4.174] Sancutary (sotthi) in the further shore.

Attagutta’ attarakkhita’….. sotthina’
[SN 5.169] Guarding the Soul and protect the Soul…..is sancutary (sotthi).

Te hi sotthim. gamissanti, kacche va’makase maga’;
jha’na’ni upasampajja, ekodi nipaka’ sata’”ti.
“Te hi pa’ram. gamissanti, chetva’ ja’lam.va ambujo;
jha’na’ni upasampajja, appamatta’ ranañjaha’”ti.
[SN 1.52] Sanctuary (sotthi)…further shore…four jhanas…the Soul.

tatha’ru’pa’su a’pada’su pariyodha’ya sam.vattati. Sotthim. atta’nam. karoti
[AN 2.68] He purifies and guards the Soul. He has made sanctuary (sotthi) for the Soul

puriso sotthina’ pa’ram. gamissati’ti.
[AN 2.201] Entity crossed to the further shore in sancutary (sotthi).

sotthim. atta’nam. karoti
[AN 3.45/MN 1.353/AN 5.347] He has made sanctuary (sotthi) for the Soul.

Niccam. maggam. visodheti, sottha’nam.
[AN 4.273/AN 4.285/AN 4.289/AN 4.322/AN 4.325] path of purity leading to everlastingness is sanctuary (sotthi).

puriso ekam.va  nidhimukham.  gavesanto  sakideva  eka’dasa  nidhimukha’ni  adhigaccheyya;  evameva  kho  aham.,  bhante,  ekam. amatadva’ram.  gavesanto  sakideva eka’dasa  amatadva’ra’ni  alattham. bha’vana’ya. purisassa aga’ram. eka’dasa dva’ram.,  so  tasmim.  aga’re  a’ditte ekamekenapi dva’rena sakkun.eyya atta’nam. sotthim. ka’tum.; evameva kho aham., bhante, imesam. eka’dasannam.  amatadva’ra’nam.  ekamekenapi  amatadva’rena  sakkun.issa’mi  atta’nam.  sotthim.  ka’tum..
[AN 5.347/MN 1.353] Just as if an entity were seeking after one door to a hidden treasure all the sudden came upon eleven doors leading to that hidden treasure, so have I as well, while seeking after one door to the Immortal, all the sudden came upon eleven doors leading to the Immortal. Just as if an entity had a home with eleven doors and when that home caught ablaze, he could bring the Soul unto sanctuary (sotthi) by any one of those eleven doors, so have I as well, while seeking after one door to the Immortal, fled by any one of those eleven doors to the Immortal which brings the Soul unto sanctuary (sotthi).

sabbattha sotthim. gacchanti, tam. Tesam. mangalamuttaman”ti.
[Khuddakapa’tha 3] Free from every determinate in sanctuary (sotthi), this is highest auspicious protection.

Cirappava’sim. Purisam., du’rato sotthima’gatam.; Ña’timitta’ suhajja’ ca, abhinandanti a’gatam.
[Vima’navatthu’ 861] The entity who has long dwelled for a long time from afar returns back unto sanctuary (sotthi); friends and comrades rejoice at his return.

sotthibha’vo mahatta’
[J-1.132] Sanctuary (sotthi) is the Great Soul become (Brahma).

Yam. dandakirañño gatassa ‚ma’ta’, ra’massaka’si sottha’nam. sugutta’.
Tam. te aham. sottha’nam. karomi, etena saccena sarantu deva’;
anuñña’to sotthi paccehi putta.
[J-1.80] Jayaddisa sanctuary (sotthi) is bliss born/protection.

Atta’nam. sankamam. katva’, yo sotthim. samata’rayi
[J-1.83] Gone unto the Soul, this is the sanctuary (sotthi) of quintessence.

Yato sara’mi atta’nam., yato pattosmi viññutam.;
na’bhija’na’mi sañcicca, ekapa’nampi him.sitam.;
etena saccavajjena, sotthim. na’va’ nivattatu’ti.
[J-1.120] Soul…..sanctuary (sotthi).

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THE SWASTIKA=SUN=SVAYAMBHU=BRAHMA=SOUL=BUDDHA=TATHAGATA  +BHU (BECOME)
Buddhoti  yo  so  bhagava’  sayambhu’
[Patisambhidamagga (KN) 1.174] The Buddha is the Lord, the Self-become (sayambhu’ Skt. Svayambhu’).

Brahmabhu’tena  attana’
[MN 1.341] The Soul is Brahma become.

sotthibha’vo mahatta’
[J-1.132] Sanctuary (sotthi) is the Great Soul become (Brahma).

sotthimatta’nam.
[MN 1.403] Made sanctuary (sotthi) for the Soul.

Brahmabhu’tam. tatha’gatam.
[Itivuttaka 57] Tathagata is Brahma become
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Arthur Anthony MacDonnell Sanskrit-English Dictionary page 372
Svasthi’-bhu: to return to ones own natural state.
Svastha: to be the Self, Self-abiding, to be home, to be at tranquil ease.
Suasti [svasti, su+asti]: auspicious, well being, -ka crossing the hands over the heart, auspicious sign. Sitting with legs crossed.
Sva: own, mine, me, self.

Arthur Anthony MacDonnell Sanskrit-English Dictionary page 33
Asti: to be, to exist, be present in
Asti: to throw out, eject, to abandon, to leave

Arthur Anthony MacDonnell Sanskrit-English Dictionary page 60
#2 Ka’: (who?) esp. of Pajapati, Brahma, n. bliss, water, head.
 

Rhys Davids Pali-English Dictionary PTS
Sottha’na (nt.) [cp. Sk. svastyayana] blessing, well--fare Sn 258; A IV.271, 285; J V.29 (where the metre requires sotthayana?, as at IV.75); VI.139.

Sotthi (f.) [Sk. svasti=su+asti] well--being, safety, bless ing A III.38=IV.266 ("brings future happiness"); J I.335; s. hotu hail! D I.96; sotthi? in safety, safely Dh 219 (=anupaddavena DhA III.293); Pv IV.64 (=nirupaddava PvA 262); Sn 269; sotthina’ safely, prosperously D I.72, 96; II.346; M I.135; J II.87; III.201. suvatthi the same J IV.32. See sotthika & sovatthika.--kamma a blessing J I.343. --ka’ra an utterer of blessings, a herald J VI.43. --gata safe wandering, prosperous journey Mhvs 8, 10; sotthigamana the same J I.272. --bha’va well--being, prosperity, safety J I.209; III.44; DhA II.58; PvA 250. –va’caka utterer of blessings, a herald Miln 359. --sa’la’ a hospital Mhvs 10, 101. (adj.) [fr. sotthi] happy, auspicious, blessed, safe VvA 95; DhA II.227 (°iya; in phrase d?gha° one who is happy for long [?]).