Exodus 34:11
Observe thou that which I command thee this day: behold, I drive out before thee the Amorite, and the Canaanite, and the Hittite, and the Perizzite, and the Hivite, and the Jebusite. Observe thou that which I command thee this day: behold, I drive out before thee the Amorite, and the Canaanite, and the Hittite, and the Perizzite, and the Hivite, and the Jebusite.
The command was given during Moses' second forty days and nights alone in communion with God on the mountain, where he was miraculously sustained with no one permitted to go up with him or to approach the mountain. This followed his preparing two tables of stone at God's command and carrying them to the summit, where God wrote on them the words of the covenant, the Ten Commandments. During that communion his face reflected the glory of the divine presence and shone with dazzling light when he descended, so that Aaron and the people in their guilt were afraid to come near him, and in compassion for their fear he put a veil over his face.
The chapter belongs to God's renewal of favor to Israel after Moses interceded for the people, when God promised to do extraordinary works on their behalf, apart from any explanation of the specific command and promise in this verse. The verse is God's covenant word to Moses requiring obedience to what He commands that day and promising to drive out the Amorite, Canaanite, Hittite, Perizzite, Hivite, and Jebusite before Israel. It shows God as a jealous God who requires obedience to His Ten Commandments. That obedience especially requires keeping the Sabbath He sanctified for His people, the seventh day as declared in His Word, leaving no excuse for carelessness and indifference about which day to keep or for keeping the first day of the week. The verse is set before professing Christians to study so that by acting as Christians they will maintain their connection with God.