Behavior toward strangers
The behavior of a person or group towards those considered strangers, i.e., those who are not citizens.
Key passages
Wis 19:13–16

And the punishments came upon the sinners not without signs having come by the force of the thunderbolt, for they were suffering justly by their own wickedness, for they also practiced a more cruel hatred of strangers. For indeed some people would not receive unknown people when they came …

Sir 11:34

Receive a stranger into your house, and he will turn you to troubles and alienate you from your own family.