18 Even when I am old and gray, do not forsake me, my God, till I declare your power to the next generation, your mighty acts to all who are to come.

Read Psalm 71:18 Using Other Translations

Now also when I am old and grayheaded, O God, forsake me not; until I have shewed thy strength unto this generation, and thy power to every one that is to come.
So even to old age and gray hairs, O God, do not forsake me, until I proclaim your might to another generation, your power to all those to come.
Now that I am old and gray, do not abandon me, O God. Let me proclaim your power to this new generation, your mighty miracles to all who come after me.