Sirach 23:18

Ben Sira, Ecclesiasticus

17 To a fornicator all bread is sweet; he will never weary until he dies. 18 The one who sins against his marriage bed says to himself, "Who can see me? Darkness surrounds me, the walls hide me, and no one sees me. Why should I worry? The Most High will not remember sins." 19 His fear is confined to human eyes and he does not realize that the eyes of the Lord are ten thousand times brighter than the sun; they look upon every aspect of human behavior and see into hidden corners

Date: 195-175 B.C.E.
* Dates are based on scholarly estimates

Ambrose On the Duty of the Clergy 1.54

54 The idea of these people will not trouble us much if we look at their actions. They will not have Him to be judge over them, Whom nothing deceives; they will not grant to Him the knowledge of things hidden, for they are afraid their own hidden things may be brought to light. But the Lord, also, knowing their works, has given them over unto darkness. In the night, he says, he will be as a thief, and the eye of the adulterer will watch for the darkness, saying, No eye shall see me; he has covered up his face. For every one that avoids the light loves darkness, seeking to be hid, though he cannot be hid from God, Who knows not only what is transacted, but also what will be thought of, both in the depths of space and in the minds of men. Thus, again, he who speaks in the book Ecclesiasticus says: Who sees me? The darkness has covered me, and the walls have hidden me; whom do I fear? But although lying on his bed he may think thus, he is caught where he never thought of it. It shall be, it says, a shame to him because he knew not what the fear of the Lord was.

Date: 390-395 C.E.
* Dates are based on scholarly estimates