loins
Genesis 35:11
And God saith to him, 'I [am] God Almighty; be fruitful and multiply, a nation and an assembly of nations is from thee, and kings from thy loins go out;
Exodus 1:5
And all the persons coming out of the thigh of Jacob are seventy persons; as to Joseph, he was in Egypt.
Judges 8:30
and to Gideon there have been seventy sons, coming out of his loin, for he had many wives;