From Benjamin, the kinsmen of Saul: 3,000, most of whom had remained loyal to the house of Saul up to that time.

2 Samuel 2:8
Meanwhile, Abner son of Ner, the commander of Saul's army, took Saul's son Ish-bosheth, moved him to Mahanaim,

2 Samuel 2:9
and made him king over Gilead, Asher, Jezreel, Ephraim, and Benjamin--over all Israel.

2 Samuel 3:19
Abner also spoke to the Benjamites and went to Hebron to tell David all that seemed good to Israel and to the whole house of Benjamin.

1 Chronicles 12:2
they were archers using both the right and left hands to sling stones and shoot arrows; and they were Saul's kinsmen from Benjamin):

1 Chronicles 12:30
From Ephraim: 20,800 mighty men of valor, famous among their own clans.

And of the children of Benjamin, the kindred of Saul, three thousand: for till now the greatest part of them had kept the ward of the house of Saul.