Exodus 1 5
Jacob had 70 descendants there, including Joseph who was already in Egypt.
Compare with other 3 random translations
AMP Exodus 1:5All the offspring of Jacob were seventy persons; Joseph was already in Egypt.
ASV Exodus 1:5And all the souls that came out of the loins of Jacob were seventy souls: and Joseph was in Egypt already.
KJV Exodus 1:5And all the souls that came out of the loins of Jacob were seventy souls: for Joseph was in Egypt already.