Seventy times seven / seventy-seven forgiveness
Here’s what it means
Jesus requires repeated, generous forgiveness rather than keeping a small tally of offenses.
Why the Bible says it this way
The writer deliberately uses very strong language to make an important point. The point is serious even though the wording is not meant literally.
A helpful detail: The number is not a permission to stop forgiving at a calculated limit. It likely reverses Lamech’s boast of escalating revenge.