2 Kings 3:21

Now all of Moab had heard that the kings had come up to fight against them, and all {who were fighting age and up} were called up, and they stood at the border.

1 Kings 20:11

The king of Israel answered and said, "Tell [him], 'Let not him who girds on his armor boast as one who takes off his armor.'"

Ephesians 6:14

Stand therefore, girding your waist with truth, and putting on the breastplate of righteousness,

Treasury of Scripture Knowledge

Summary

And when all the Moabites heard that the kings were come up to fight against them, they gathered all that were able to put on armour, and upward, and stood in the border.

Bible References

Put on armour

1 Kings 20:11
The king of Israel answered and said, "Tell [him], 'Let not him who girds on his armor boast as one who takes off his armor.'"
Ephesians 6:14
Stand therefore, girding your waist with truth, and putting on the breastplate of righteousness,