New American Standard Bible (NASB)
Exodus 17
10 Joshua did as Moses told him, and fought against Amalek; and Moses, Aaron, and Hur went up to the top of the hill.
11 So it came about when Moses held his hand up, that Israel prevailed, and when he let his hand down, Amalek prevailed.
12 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.
13 So Joshua overwhelmed Amalek and his people with the edge of the sword.
14 Then the Lord said to Moses, "Write this in a book as a memorial and recite it to Joshua, that I will utterly blot out the memory of Amalek from under heaven."
15 Moses built an altar and named it The Lord is My Banner;
16 and he said, "The Lord has sworn; the Lord will have war against Amalek from generation to generation."
Exodus 18
1 Now Jethro, the priest of Midian, Moses’ father-in-law, heard of all that God had done for Moses and for Israel His people, how the Lord had brought Israel out of Egypt.
2 Jethro, Moses’ father-in-law, took Moses’ wife Zipporah, after he had sent her away,
3 and her two sons, of whom one was named Gershom, for Moses said, "I have been a sojourner in a foreign land."
4 The other was named Eliezer, for he said, "The God of my father was my help, and delivered me from the sword of Pharaoh."