2 Samuel 20:18
She said: There is an old saying: 'Be sure to seek guidance from Abel before doing anything.' That is the way they settle disputes.
Deuteronomy 20:10-11
When you go to attack a city, first give its people a chance to surrender.
Treasury of Scripture Knowledge
Summary
Then she spake, saying, They were wont to speak in old time, saying, They shall surely ask counsel at Abel: and so they ended the matter.
They were wont, etc
Bible References
They were wont, etc
Deuteronomy 20:10
When you go to attack a city, first give its people a chance to surrender.