“thigh.” An idiom. The “thigh” is euphemistic for the genital organs, and the idiom “came out of his thigh” refers to his direct descendants (see commentary on Gen. 24:2).
[For more information on sexual euphemisms, see commentary on Isa. 47:2.]
“70 souls.” The Masoretic Hebrew text says that 70 people went to Egypt when Jacob and his family went to Egypt to be with Joseph, and this agrees with Deuteronomy 10:22.