Scripture, and this holds true for married couples in the Bible.
We just don’t know of couples’ age differences in the Bible.
Abraham and Sarah are the exception;
we do know the age difference between those two.
When God promised Abraham that he and Sarah would be the start
of many nations, “Abraham fell facedown; he laughed and said to himself,
‘Will a son be born to a man a hundred years old?
Will Sarah bear a child at the age of ninety?’”…