Strengthen ye the weak hands, and confirm the feeble knees. (35:3)

Say to them [that are] of a fearful heart, Be strong, fear not: behold, your God will come [with] vengeance, [even] God [with] a recompense; he will come and save you. (35:4)

--Luke--

And he spake a parable unto them [to this end], that men ought always to pray, and not to faint; (18:1)

Saying, There was in a city a judge, which feared not God, neither regarded man: (18:2)

And there was a widow in that city; and she came unto him, saying, Avenge me of mine adversary. (18:3)

And he would not for a while: but afterward he said within himself, Though I fear not God, nor regard man; (18:4)

Yet because this widow troubleth me, I will avenge her, lest by her continual coming she weary me. (18:5)

And the Lord said, Hear what the unjust judge saith. (18:6)

And shall not God avenge his own elect, which cry day and night unto him, though he bear long with them? (18:7)

I tell you that he will avenge them speedily. Nevertheless when the Son of man cometh, shall he find faith on the earth? (18:8)

--Hebrews--

Wherefore lift up the hands which hang down, and the feeble knees; (12:12)

And make straight paths for your feet, lest that which is lame be turned out of the way; but let it rather be healed. (12:13)