Then Rehoboam went to Shechem, for all Israel had gone to Shechem to make him king.
References for 1 Kings 12:1
When Jeroboam son of Nebat heard [about it], for he was still in Egypt where he had fled from King Solomon's presence, Jeroboam stayed in Egypt.
References for 1 Kings 12:2
They summoned him, and Jeroboam and the whole assembly of Israel came and spoke to Rehoboam:
"Your father made our yoke harsh. You, therefore, lighten your father's harsh service and the heavy yoke he put on us, and we will serve you."