Seri (also known as Serah or Zerah) was one of the twin sons of Judah and Tamar. He is known for the red thread that the midwife tied around his hand at birth, even though his twin brother Perez was ultimately born first. Seri became the ancestor of the Zerahites and is mentioned in several genealogies in the Old Testament.
28As she was giving birth, one of them put out his hand, and the midwife took a scarlet thread and tied it around his wrist, saying, "This one came out first."
1But the Israelites broke faith concerning the things devoted to destruction. Achan son of Carmi, son of Zabdi, son of Zerah, of the tribe of Judah, took some of what was devoted, and the LORD's anger burned against the Israelites.
17He brought forward the clans of Judah, and the clan of the Zerahites was singled out. He brought the clan of the Zerahites forward man by man, and Zabdi was singled out.
24Then Joshua, together with all Israel, took Achan son of Zerah, along with the silver, the robe, and the bar of gold, his sons and daughters, his cattle, donkeys and sheep, his tent and everything he had, and brought them up to the Valley of Achor.