Book of Jubilees 28:13
Jacob again went in to Leah. She became pregnant and gave birth to a second son for Jacob. He named him Simeon on the twenty-first of the tenth month and during the third year of this week [2124].
Jacob again went in to Leah. She became pregnant and gave birth to a second son for Jacob. He named him Simeon on the twenty-first of the tenth month and during the third year of this week [2124].