'Twelve' in the Bible

When he was come into his house, he took a knife, and laid hold on his concubine, and divided her, limb by limb, into twelve pieces, and sent her throughout all the borders of Israel.

The congregation sent there twelve thousand men of the most valiant, and commanded them, saying, "Go and strike the inhabitants of Jabesh Gilead with the edge of the sword, with the women and the little ones.