Treatment of aliens/strangers in Exodus, Leviticus and Deuteronomy

Exodus 22:21 “You shall not wrong an alien or oppress him, for you were aliens in the land of Egypt.
Exodus 23:9 “You shall not oppress an alien, for you know the heart of an alien, since you were aliens in the land of Egypt.
Leviticus 19:10 You shall not glean your vineyard, neither shall you gather the fallen grapes of your vineyard. You shall leave them for the poor and for the foreigner. I am the Yahweh your God. (This command is repeated in other parts of the Bible.)
Leviticus 19:33 “‘If a stranger lives as a foreigner with you in your land, you shall not do him wrong. 34 The stranger who lives as a foreigner with you shall be to you as the native-born among you, and you shall love him as yourself; for you lived as foreigners in the land of Egypt. I am Yahweh your God.
Deuteronomy 10:19 Therefore love the foreigner, for you were foreigners in the land of Egypt.

The Bible also says, in reference to a specific refugee crisis:

Isaiah 16:3 Give counsel! Execute justice! Make your shade like the night in the middle of the noonday! Hide the outcasts! Don’t betray the fugitive! 4a Let my outcasts dwell with you! As for Moab, be a hiding place for him from the face of the destroyer.

The Moabites hadn't always been good to Israel. See Joshua 24:9, Judges 3:12-30, and 1 Samuel 12:9.

And, of course, there's always the Golden Rule: Matthew 7:12 Therefore whatever you desire for men to do to you, you shall also do to them; for this is the law and the prophets.

(World English Bible, public domain.)