Genesis 46:26
All the persons who are coming to Jacob to Egypt, coming out of his thigh, apart from the wives of Jacob's sons, all the persons are sixty and six.
Exodus 1:5
And all the persons coming out of the thigh of Jacob are seventy persons; as to Joseph, he was in Egypt.
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;
Judges 8:30
and to Gideon there have been seventy sons, coming out of his loin, for he had many wives;
Treasury of Scripture Knowledge
Summary
All the souls that came with Jacob into Egypt, which came out of his loins, besides Jacob's sons' wives, all the souls were threescore and six;
General references
Bible References
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;
General references
Hebrews 7:10
for he was yet in the loins of the father when Melchisedek met him.