Psalm 71:15-18

My mouth shall shew forth thy righteousness and thy salvation all the day; For I know not the numbers thereof. I will go in the strength of the Lord GOD: I will make mention of thy righteousness, even of thine only. O God, thou hast taught me from my youth: And hitherto have I declared thy wondrous works. Now also when I am old and greyheaded, O God, forsake me not; Until I have shewed thy strength unto this generation, and thy power to every one that is to come.