Genesis 43:29

²⁹ And he lifted up his eyes, and saw his brother Benjamin, his mother's son, and said, Is this your younger brother, of whom ye spoke to me? And he said, God be gracious to thee, my son.

Two and a half

In Exodus 25:10, this signifies much and full; when predicated of the Divine it signifies all. Its meaning is similar to that of five and ten.