Shanti Parva 316.15

Thus merging these one after another, Yogins meditate on the Supreme Soul which is One, which is freed from Darkness, which is Immutable and Infinite and Pure and without defect, and without blemish, who is Eternal Soul, who is unchangeable, who is Indivisible, who is without decay and death, who is everlasting who is above decrease, and which is Immutable Brahma.