It was the mixed multitude who came from Egypt with the Israelites that were the principal movers in this dreadful departure from God. They were called a mixed multitude, because the Hebrews had intermarried with the Egyptians. (3SG 274.1) MC VC

The children of Israel had seen Moses ascend up into the mount, and enter into the cloud while the top of the mountain was all in flames. They waited for his return every day, and as he did not come from the mount as soon as they expected he would, they became impatient. Especially were the believing Egyptians, who left Egypt with the Hebrew host, impatient and rebellious. (3SG 274.2) MC VC

A large company assembled around the tent of Aaron, and told him that Moses would never return—that the cloud which had hitherto led them now rested upon the mount, and would no longer direct their route through the wilderness. They desired something which they could look upon to resemble God. The gods of the Egyptians were in their minds, and Satan was improving this opportunity, in the absence of their appointed leader, to tempt them to imitate the Egyptians in their idolatry. They suggested that if Moses should never return to them, they could return into Egypt, and find favor with the Egyptians, by bearing this image before them, acknowledging it as their god. (3SG 274.3) MC VC