Ner in the Bible

But Abner the son of Ner, captain of Saul's host, took Ish-bosheth the son of Saul, and brought him over to Mahanaim;

And Abner the son of Ner, and the servants of Ish-bosheth the son of Saul, went out from Mahanaim to Gibeon.

When Joab and all the host that was with him had come, they told Joab, saying, Abner the son of Ner came to the king, and he hath sent him away, and he hath gone in peace.

Thou knowest Abner the son of Ner, that he came to deceive thee, and to know thy going-out and thy coming-in, and to know all that thou doest.

And afterward when David heard it, he said, I and my kingdom are guiltless before the LORD for ever from the blood of Abner the son of Ner:

For all the people and all Israel understood that day that it was not of the king to slay Abner the son of Ner.