2 Samuel 2:11
“And the time that David was king in Hebron over the house of Judah was seven years and six months.”
And made him king over Gilead, and over the Ashurites, and over Jezreel, and over Ephraim, and over Benjamin, and over all Israel.
Ish–bosheth Saul’s son was forty years old when he began to reign over Israel, and reigned two years. But the house of Judah followed David.
And the time that David was king in Hebron over the house of Judah was seven years and six months.
And Abner the son of Ner, and the servants of Ish–bosheth the son of Saul, went out from Mahanaim to Gibeon.
And Joab the son of Zeruiah, and the servants of David, went out, and met together by the pool of Gibeon: and they sat down, the one on the one side of the pool, and the other on the other side of the pool.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“In Hebron he reigned over Judah seven years and six months: and in Jerusalem he reigned thirty and three years over all Israel and Judah.”
“And Jacob came unto Isaac his father unto Mamre, unto the city of Arbah, which is Hebron, where Abraham and Isaac sojourned.”
“And they ascended by the south, and came unto Hebron; where Ahiman, Sheshai, and Talmai, the children of Anak, were. (Now Hebron was built seven years before Zoan in Egypt.)”
“Wherefore Adoni–zedek king of Jerusalem sent unto Hoham king of Hebron, and unto Piram king of Jarmuth, and unto Japhia king of Lachish, and unto Debir king of Eglon, saying,”
“And it came to pass after this, that David enquired of the Lord, saying, Shall I go up into any of the cities of Judah? And the Lord said unto him, Go up. And David said, Whither shall I go up? And he said, Unto Hebron.”