“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.]
“seventy souls.” The Masoretic Hebrew text says that seventy people went to Egypt when Jacob and his family went to Egypt to be with Joseph, and this agrees with Deuteronomy 10:22.