1 Kings 12:2-3

12:2 When Jeroboam son of Nebat heard the news, he was still in Egypt, where he had fled from King Solomon and had been living ever since. 12:3 They sent for him, and Jeroboam and the whole Israelite assembly came and spoke to Rehoboam, saying,

1 Kings 12:20

12:20 When all Israel heard that Jeroboam had returned, they summoned him to the assembly and made him king over all Israel. No one except the tribe of Judah remained loyal to the Davidic dynasty.