"The earliest and most authentic record is of course by Hiuen Tsang [= Xuan Zang] who visited Bodh Gaya in A.D. 637. He says that two Brahmin brothers prayed to Lord Maheshwara in the Himalayas to grant their wishes, upon which Maheshwara instructed them to carry out the meritorious task of erecting a large temple and excavate a large tank and devote all kinds of religious offerings near the most sanctified Bodhi tree for attaining ‘the fruit of a Buddha’. The elder Brahmin devotee accordingly built a large temple”."
January 1, 1970
https://en.wikiquote.org/wiki/Bodh_Gaya