Shiva Purana
उषां प्रभां तथा प्राज्ञां सन्ध्यामपि ततः परम् ॥ ऐशानादिषु विन्यस्य द्वितीयावरणे यजेत् ॥ ३१ ॥
He shall worship in the second Āvaraṇa, Uṣā, Prabhā, Prājñā and Sandhyā after fixing them in Īśāna etc.
english translation
uSAM prabhAM tathA prAjJAM sandhyAmapi tataH param ॥ aizAnAdiSu vinyasya dvitIyAvaraNe yajet ॥ 31 ॥
hk transliteration by Sanscript