Book of Jubilees 28:14
Jacob again went in to Leah. She became pregnant and gave birth to a third son for him. He named him Levi on the first of the first month during the sixth year of this week [2127].
Jacob again went in to Leah. She became pregnant and gave birth to a third son for him. He named him Levi on the first of the first month during the sixth year of this week [2127].