2 Samuel 20:18

Then she spoke, saying, They were accustomed to speak in old time, saying, They shall surely ask [counsel] at Abel, and so they ended [the matter].

Deuteronomy 20:10-11

When thou draw near to a city to fight against it, then proclaim peace to it.

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 thou draw near to a city to fight against it, then proclaim peace to it.