Genesis 46:26

All the persons who came with Jacob into Egypt—who were his direct descendants, not counting the wives of [Jacob or] Jacob’s sons, were sixty-six persons in all,

Exodus 1:5

All the descendants of Jacob were seventy people; Joseph was [already] in Egypt.

Genesis 35:11

And God said to him,

“I am God Almighty.
Be fruitful and multiply;
A nation and a company of nations shall come from you,
And kings shall be born of your loins.

Judges 8:30

Now Gideon had seventy sons born to him, because 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 said to him,

“I am God Almighty.
Be fruitful and multiply;
A nation and a company of nations shall come from you,
And kings shall be born of your loins.
Exodus 1:5
All the descendants of Jacob were seventy people; Joseph was [already] in Egypt.
Judges 8:30
Now Gideon had seventy sons born to him, because he had many wives.

General references

Hebrews 7:10
for Levi was still in the loins (unborn) of his forefather [Abraham] when Melchizedek met him (Abraham).