Reuben was the firstborn son of Jacob and Leah, born in Paddan Aram around 1669 BC. As the eldest of the six sons, he served as a founder of one of the twelve tribes of Israel. Although he held the position of firstborn, his relationship with his father was strained due to his actions, which resulted in the loss of his birthright to his brother Joseph. He is recognized as a saint and is commemorated on 11 December.