John Wesley on Exodus 6:16

The age of Levi, Kohath, and Amram, the father, grandfather, and great grandfather of Moses is here recorded; and they all lived to a great age, Levi to one hundred thirty seven, Kohath to one hundred thirty three, and Amram to one hundred thirty seven: Moses himself came much short of them, and fixed seventy or eighty for the ordinary stretch of human life. Psa 90:10. For now Israel was multiplied, and become a great nation, and divine revelation was by the hand of Moses committed to writing, and no longer trusted to tradition; the two great reasons for the long lives of the patriarchs were ceased, and therefore from henceforward fewer years must serve men.