Verses with the word depth in the Apocrypha (2 verses):

Judith 8:14
For ye cannot find the depth of the heart of man, neither can ye perceive the things that he thinketh: then how can ye search out God, that hath made all these things, and know his mind, or comprehend his purpose? Nay, my brethren, provoke not the Lord our God to anger.

Sirach 51:5
From the depth of the belly of hell, from an unclean tongue, and from lying words.