1 King Solomon was king over all Israel.
1 Kings 4:1 Cross References - WEB
2 Samuel 5:5
5 In Hebron he reigned over Judah seven years and six months; and in Jerusalem he reigned thirty-three years over all Israel and Judah.
1 Kings 11:13
13 However I will not tear away all the kingdom; but I will give one tribe to your son, for David my servant’s sake, and for Jerusalem’s sake which I have chosen.”
1 Kings 11:35-36
1 Kings 12:19-20
1 Chronicles 12:38
38 All these were men of war, who could order the battle array, and came with a perfect heart to Hebron, to make David king over all Israel; and all the rest also of Israel were of one heart to make David king.
2 Chronicles 9:30
30 Solomon reigned in Jerusalem over all Israel forty years.
Ecclesiastes 1:12
12 I, the Preacher, was king over Israel in Jerusalem.