God is powerful...

From BST Numbers by Raymond Brown, Chapter: Community Servants - Pg 40

God is powerful. Here he was at Sinai, communicating with them a year after they 'came out of Egypt' (1:1). It is the language of redemption. They were a unique people for whom God has acted as guide, deliverer, warrior and provider. They need not fear the future. An almighty God would generously meet their needs and always be their victor if, on their part, they listened attentively and responsively to his voice.

God as a guide: Exodus 13:20-22 :And they moved on from Succoth and encamped at Etham, on the edge of the wilderness. And the LORD went before them by day in a pillar of cloud to lead them along the way, and by night in a pillar of fire to give them light, that they might travel by day and by night. The pillar of cloud by day and the pillar of fire by night did not depart from before the people.

God is deliverer: Exodus 14:13 And Moses said to the people, "Fear not, stand firm, and see the salvation of the LORD, which he will work for you today. For the Egyptians whom you see today, you shall never see again.

God is warrior :
Exodus 14:26 Then the LORD said to Moses, "Stretch out your hand over the sea, that the water may come back upon the Egyptians, upon their chariots, and upon their horsemen."

Exodus 15:3 The LORD is a man of war; the LORD is his name.

Exodus 17:8-16 Israel Defeats Amalek
8 Then Amalek came and fought with Israel at Rephidim. 9So Moses said to Joshua, "Choose for us men, and go out and fight with Amalek. Tomorrow I will stand on the top of the hill with the staff of God in my hand." 10So Joshua did as Moses told him, and fought with Amalek, while Moses, Aaron, and Hur went up to the top of the hill. 11Whenever Moses held up his hand, Israel prevailed, and whenever he lowered his hand, Amalek prevailed. 12But Moses’ hands grew weary, so they took a stone and put it under him, and he sat on it, while 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 going down of the sun. 13And Joshua overwhelmed Amalek and his people with the sword.
14Then the LORD said to Moses, "Write this as a memorial in a book and recite it in the ears of Joshua, that I will utterly blot out the memory of Amalek from under heaven." 15And Moses built an altar and called the name of it, The LORD Is My Banner, 16saying, "A hand upon the throne[a] of the LORD! The LORD will have war with Amalek from generation to generation."

God is provider :Exodus 15:22-17:7 - Bitter Water Made Sweet, Bread from Heaven, Water from the Rock