Skandapurana 6.3.14.13

6.3.14.13

yadbrahma ādyaṃ pravadanti kecidyaṃ sarvamīśānamajaṃ purāṇam .
tamekarūpaṃ tamanekarūpamarūpamādyaṃ paramavyayākhyam .. 14.13 ..

that which some declare to be the primal Brahman, whom [they declare to be] the Lord, all-pervading, unborn, and ancient— / him whose form is one, whose forms are manifold, formless, primal, called the supreme imperishable;