Genesis 11:20 records that Reu was thirty-two years old when he became the father of Serug. This verse is part of a genealogy, listing the ages and descendants of key figures after the flood.
Genesis 11:20 is found in a section where the descendants of Shem, Noah’s son, are being traced. The verse simply states a fact about Reu’s age when his son Serug was born, helping to establish the timeline and continuity of this family line. These genealogies were important for the original audience to understand their ancestry and the unfolding story leading to Abraham.