Psalm 121:1-8 and Exodus 17:8-13

Psalm 121:1-8
1 A Canticle in steps. I have lifted up my eyes to the mountains; from thence help will come to me.
2 My help is from the Lord, who made heaven and earth.
3 May he not allow your foot to be moved, and may he not slumber, who guards you.
4 Behold, he who guards Israel will neither sleep, nor slumber.
5 The Lord is your keeper, the Lord is your protection, above your right hand.
6 The sun will not burn you by day, nor the moon by night.
7 The Lord guards you from all evil. May the Lord guard your soul.
8 May the Lord guard your entrance and your exit, from this time forward and even forever.
Exodus 17:8-13
8 And Amalek came and fought against Israel at Rephidim.
9 And Moses said to Joshua: "Choose men. And when you go out, fight against Amalek. Tomorrow, I will stand at the top of the hill, holding the staff of God in my hand."
10 Joshua did as Moses had spoken, and he fought against Amalek. But Moses and Aaron and Hur ascended to the top of the hill.
11 And when Moses lifted up his hands, Israel prevailed. But when he released them a little while, Amalek overcame.
12 Then the hands of Moses became heavy. And so, taking a stone, they placed it beneath him, and he sat on it. Then Aaron and Hur sustained his hands from both sides. And it happened that his hands did not tire until the setting of the sun.
13 And Joshua put to flight Amalek and his people by the edge of the sword.