New Revised Standard Version
But Moses’ hands grew weary; so they took a stone and put it under him, and he sat on it. Aaron and Hur held up his hands, one on one side, and the other on the other side; so his hands were steady until the sun set.

Contemporary English Version
After a while, his arms were so tired that Aaron and Hur got a rock for him to sit on. Then they stood beside him and supported his arms in the same position until sunset.

New American Bible
Moses’ hands, however, grew tired; so they took a rock and put it under him and he sat on it. Meanwhile Aaron and Hur supported his hands, one on one side and one on the other, so that his hands remained steady until sunset.

Douay-Rheims Bible
And Moses's hands were heavy: so they took a stone, and put under him, and he sat on it: and Aaron and Hur stayed up his hands on both sides. And it came to pass, that his hands were not weary until sunset.

And Moses's hands were heavy: so they took a stone, and put under him, and he sat on it: and Aaron and Hur stayed up his hands on both sides. And it came to pass, that his hands were not weary until sunset.

Moses' hands

Matthew 26:40-45 And he cometh to his disciples and findeth them asleep. And he saith to Peter: What? Could you not watch one hour with me? . . .

Mark 14:37-40 And he cometh and findeth them sleeping. And he saith to Peter: Simon, sleepest thou? Couldst thou not watch one hour? . . .

Ephesians 6:18 By all prayer and supplication praying at all times in the spirit: and in the same watching with all instance and supplication for all the saints:

Colossians 4:2 Be instant in prayer: watching in it with thanksgiving.

stayed up his hands

Psalm 35:3 Bring out the sword, and shut up the way against them that persecute me: say to my soul: I am thy salvation.

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

2 Corinthians 1:11 You helping withal in prayer for us. That for this gift obtained for us, by the means of many persons, thanks may be given by many in our behalf.

Philippians 1:19 For I know that this shall fall out to me unto salvation, through your prayer and the supply of the Spirit of Jesus Christ,

1 Thessalonians 5:25 Brethren, pray for us.

Hebrews 12:12 Wherefore, lift up the hands which hang down and the feeble knees:

James 1:6 But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea, which is moved and carried about by the wind.