Jeroboam had by this time removed from Shechem, and established a new capital in Tirzah, one of the old Canaanite towns Joshua 12:24 - a town of great reputation for beauty, counted in that respect on a par with Jerusalem Song of Solomon 6:4. Tirzah is perhaps to be identified with “Telluzah,” a place in the mountains about 9 miles distant from Shechem (Nablous) (or with Teiasir - Conder). It may have been the palatial residence of the kings rather than the actual capital of the country. It remained the capital until Omri built Samaria 1 Kings 16:23-24. Toward the close of the kingdom it appears again as the city of Menahem, who murdered Shallum and succeeded him 2 Kings 15:14.
The threshold of the door - literally,” the threshold of the house.” Compare the prophecy 1 Kings 14:12. The child actually died as she crossed the threshold of the palace. Probably the palace, like that of Sargon at Khorsabad, lay at the outer edge of the town.