Isaiah 35:3

Strengthen the weak hands, And make firm the feeble knees.

Surrounding context

35:2 It shall blossom abundantly and rejoice, Even with joy and singing. The glory of Lebanon shall be given to it, The excellence of Carmel and Sharon. They shall see the glory of the LORD, The excellency of our God.

35:3 Strengthen the weak hands, And make firm the feeble knees.

35:4 Say to those who are fearful-hearted, "Be strong, do not fear! Behold, your God will come with vengeance, With the recompense of God; He will come and save you."

Translation and sources