What does 2 Chronicles 30:1 mean?

Hezekiah sent word to all Israel and Judah, and even wrote letters to Ephraim and Manasseh, inviting them to come to the Lord’s temple in Jerusalem to celebrate the Passover for the Lord, the God of Israel. 2 Chronicles 30:1 - Modern Text Bible

(Hezekiah wanted everyone, not just those in Judah, to come together and celebrate Passover, reaching out even to the northern tribes who had been separated.)