Isaiah 35:3,4
Strengthen you the weak hands, and confirm the feeble knees.
Nave's Topical Index—AKJV

Luke 18:1-8
And he spoke a parable to them to this end, that men ought always to pray, and not to faint;
Nave's Topical Index—AKJV

Hebrews 12:12,13
Why lift up the hands which hang down, and the feeble knees;
Nave's Topical Index—AKJV