Before Moses went up Mount Sinai, the Israelites confirmed their covenant with God. In below scriptures we see that, 40 days later, they had already apostatized and had Aaron create a golden calf, to which they offered their worship. Only Moses’ intervention saves the Israelites from God’s wrath.
The Golden Calf
1 When the people saw that Moses delayed to come down from the mountain, the people gathered around Aaron, and said to him, “Come, make gods for us, who shall go before us; as for this Moses, the man who brought us up out of the land of Egypt, we do not know what has become of him.” 2 Aaron said to them, “Take off the gold rings that are on the ears of your wives, your sons, and your daughters, and bring them to me.” 3 So all the people took off the gold rings from their ears, and brought them to Aaron. 4 He took the gold from them, formed it in a mold, and cast an image of a calf; and they said, “These are your gods, O Israel, who brought you up out of the land of Egypt!” 5 When Aaron saw this, he built an altar before it; and Aaron made proclamation and said, “Tomorrow shall be a festival to the Lord.” 6 They rose early the next day, and offered burnt offerings and brought sacrifices of well-being; and the people sat down to eat and drink, and rose up to revel.
7 The Lord said to Moses, “Go down at once! Your people, whom you brought up out of the land of Egypt, have acted perversely; 8 they have been quick to turn aside from the way that I commanded them; they have cast for themselves an image of a calf, and have worshiped it and sacrificed to it, and said, ‘These are your gods, O Israel, who brought you up out of the land of Egypt!’” 9 The Lord said to Moses, “I have seen this people, how stiff-necked they are. 10 Now let me alone, so that my wrath may burn hot against them and I may consume them; and of you I will make a great nation.”
11 But Moses implored the Lord his God, and said, “O Lord, why does your wrath burn hot against your people, whom you brought out of the land of Egypt with great power and with a mighty hand? 12 Why should the Egyptians say, ‘It was with evil intent that he brought them out to kill them in the mountains, and to consume them from the face of the earth’? Turn from your fierce wrath; change your mind and do not bring disaster on your people. 13 Remember Abraham, Isaac, and Israel, your servants, how you swore to them by your own self, saying to them, ‘I will multiply your descendants like the stars of heaven, and all this land that I have promised I will give to your descendants, and they shall inherit it forever.’” 14 And the Lord changed his mind about the disaster that he planned to bring on his people.
15 Then Moses turned and went down from the mountain, carrying the two tablets of the covenant in his hands, tablets that were written on both sides, written on the front and on the back. 16 The tablets were the work of God, and the writing was the writing of God, engraved upon the tablets. 17 When Joshua heard the noise of the people as they shouted, he said to Moses, “There is a noise of war in the camp.” 18 But he said,
“It is not the sound made by victors,
or the sound made by losers;
it is the sound of revelers that I hear.”
19 As soon as he came near the camp and saw the calf and the dancing, Moses’ anger burned hot, and he threw the tablets from his hands and broke them at the foot of the mountain. 20 He took the calf that they had made, burned it with fire, ground it to powder, scattered it on the water, and made the Israelites drink it.