Of the children of Benjamin, by their generations, after their families, by the house of their fathers, according to the number of the names, from twenty years old and upward, all that were able to go forth to war;
Genesis 35:16-18
16
And they journeyed from Bethel. And there was but a little way to come to Ephrath; and Rachel travailed, and she had hard labor.
17
And it came to pass, when she was in hard labor, that the midwife said unto her, "Fear not. Thou shalt have this son also."
18
And it came to pass as her soul was in departing (for she died), that she called his name Benoni [that is, The son of my sorrow], but his father called him Benjamin [that is, The son of the right hand].
And we said unto my lord, `We have a father, an old man, and a child of his old age, a little one; and his brother is dead, and he alone is left of his mother, and his father loveth him.'