But Moses' hands were heavy; and they took a stone, and put it under him, and he sat on it; and Aaron and Hur held up his hands, the one on the one side, and the other on the other side; and his hands were steady until the going down of the sun.
All Commentaries on Exodus 17:12 Go To Exodus 17
Justin Martyr
AD 165
Besides, the fact that the prophet Moses remained until evening in the form of the cross, when his hands were held up by Aaron and Hur, happened in the likeness of this sign. For the Lord also remained upon the cross until evening, when he was buried. Then he rose from the dead on the third day.