'Tottering' in the Bible

“Your words have helped the tottering to stand,And you have strengthened feeble knees.

How long will ye imagine mischief against a man? ye shall be slain all of you: as a bowing wall shall ye be, and as a tottering fence.

A bad tooth, and a tottering foot, Is the confidence of the treacherous in a day of adversity.

Strengthen the weak hands and confirm the tottering knees.