Psalm 90:10:

The days of our years are threescore and ten; and if by reason of strength they be fourscore years, yet is their strength labour and sorrow; for it is soon cut off, and we fly away.

Notes on Psalm 90:10:

This is NOT a proof that we are “living on borrowed time” (as some like to say) after 70 or 80 years.  You can’t borrow time anyway (how would you ever pay it back?) and this verse in its context is a part of a lament about how bad things were – they were only living 70 or 80 years.  But Moses, who wrote this, lived to be 120, so the author of this verse obviously didn’t consider 80 to be an upper limit!  In fact, 120 isn’t an upper limit either, as many Old Testament people (even after Genesis 6) lived more than 120 years.  This is elaborated upon with specific proof verses elsewhere.

See also:

Notes on Deuteronomy 34:7
Notes on Psalm 61:6
How Many Years Should We Expect to Live?
Is There an Appointed Time for Each Person to Die?