'Twelve' in the Bible

So they came forward and passed by in number: twelve for Benjamin and for Ish-Bosheth the son of Saul, and twelve from the servants of David.

When the {Ammonites} saw that they had become odious to David, the {Ammonites} sent [word] and hired Aram Beth-Rehob and Aram-Zobah, twenty thousand infantry; and [they also hired] the king of Maacah, a thousand men, and the men of Tob, twelve thousand men.

Then Ahithophel said to Absalom, "Please let me choose twelve thousand men, and I will set out and pursue after David {tonight}.