'Bone' in the Bible

Then all the tribes of Israel came to David at Hebron and said, “Behold, we are your bone and your flesh.

You are my brothers (relatives, relations); you are my bone and my flesh. Why then are you the last to bring back the king?’

Say to Amasa [the commander of Absalom’s troops], ‘Are you not my bone and my flesh? May God do so to me, and more also, if you will not be commander of my army from now on in place of Joab.’”