2 Chronicles 30:1
"And Hezekiah sent to all Israel and Judah, and wrote letters also to Ephraim and Manasseh, that they should come to the house of the LORD at Jerusalem, to keep the passover unto the LORD God of Israel."
Cross References (ranked by relevance)
So kill the passover, and sanctify yourselves, and prepare your brethren, that they may do according to the word of the LORD by the hand of Moses.
But there came a man of God to him, saying, O king, let not the army of Israel go with thee; for the LORD is not with Israel, to wit, with all the children of Ephraim.
And the priests and the Levites that were in all Israel resorted to him out of all their coasts.
And after them out of all the tribes of Israel such as set their hearts to seek the LORD God of Israel came to Jerusalem, to sacrifice unto the LORD God of their fathers.
They will not frame their doings to turn unto their God: for the spirit of whoredoms is in the midst of them, and they have not known the LORD.
How shall I give thee up, Ephraim? how shall I deliver thee, Israel? how shall I make thee as Admah? how shall I set thee as Zeboim? mine heart is turned within me, my repentings are kindled together.