"The feeble knees"

1. Job 4: 4
   4 Thy words have upholden him that was falling, and thou hast strengthened the feeble knees.
2. Isa. 35: 3
   3 ¶ Strengthen ye the weak hands, and confirm the feeble knees.
3. Heb. 12: 12
   12 Wherefore lift up the hands which hang down, and the feeble knees;
4. D&C 81: 5
   5 Wherefore, be faithful; stand in the office which I have appointed unto you; succor the weak, lift up the hands which hang down, and strengthen the feeble knees.