When Jeroboam son of Nebat heard about this, he was still in Egypt where he had fled from King Solomon and had been living ever since.

1 Kings 11:26
Now Jeroboam son of Nebat was an Ephraimite from Zeredah whose mother was a widow named Zeruah. Jeroboam was a servant of Solomon, but he rebelled against the king,

1 Kings 11:40
Solomon therefore sought to kill Jeroboam. But Jeroboam arose and fled to Egypt, to Shishak king of Egypt, where he remained until the death of Solomon.

1 Kings 12:3
So they sent for Jeroboam, and he and the whole assembly of Israel came to Rehoboam and said,

And it came to pass, when Jeroboam the son of Nebat, who was yet in Egypt, heard of it, (for he was fled from the presence of king Solomon, and Jeroboam dwelled in Egypt;)