Isaiah 35:3

But Moses’ hands were heavy. Then they took a stone and put it under him, and he sat on it; and Aaron and Hur supported his hands, one on one side and one on the other. Thus his hands were steady until the sun set.

All those around them strengthened them with articles of silver, with gold, with possessions, with cattle, and with precious things, aside from all that was given as a freewill offering.

Then this one with the appearance of a man touched me again and strengthened me.

In that day it will be said to Jerusalem: “Do not fear, O Zion; Do not let your hands fall limp.

Therefore, strengthen the hands that are weak and the knees that are feeble,