Shiva Purana
प्रथमावरणे वेदांश्चतुरो वा प्रपूजयेत् ॥ इतिहासपुराणानि द्वितीयावरणे पुनः ॥ ४७ ॥
He shall worship the four Vedas in the first, the Itihāsas and Purāṇas in the second Āvaraṇa.
english translation
prathamAvaraNe vedAMzcaturo vA prapUjayet ॥ itihAsapurANAni dvitIyAvaraNe punaH ॥ 47 ॥
hk transliteration by Sanscript