The Bible on Immigration

Christians often quote the Bible to take their moral or ethical stand. I've not heard much Bible in the immigration conversation. Here's one passage I found:

"When an alien resides with you in your land, you shall not oppress the alien. The alien who resides with you shall be to you as the citizen among you; you shall love the alien as yourself, for you were aliens in the land of Egypt: I am the Lord your God." (Leviticus 19:33-34)

What other passages do you read in the Christian scripture that speak to immigration issues in our country?