Deuteronomy 32:4  He is the Rock, his work is perfect: for all his ways are judgment: a God of truth and without iniquity, just and right is he.

2 Samuel 22:31  As for God, his way is perfect; the word of the LORD is tried: he is a buckler to all them that trust in him.

John 17:23  I in them, and thou in me, that they may be made perfect in one; and that the world may know that thou hast sent me, and hast loved them, as thou hast loved me.