Stranger
The word "stranger" is used many times in the Bible, and it is sometimes paired with the word "sojourner". They are different concepts in the Hebrew, and some translations make the mistake of using them interchangeably. 'A sojourner', like 'a stranger', indicates a newcomer and inhabitant from another land; but 'a sojourner' refers to people who were taught and accepted the Church's truths, whereas those who were not taught them because they were unwilling to accept them are called 'strangers'. (Arcana Coelestia 8002)
In Ezekiel 28:7, 'strangers' signify falsities which destroy truths, and 'the terrible of the nations' signifies evils which destroy good.
Matthew 10:41-42
41
He who receives a prophet in the name of a prophet will receive a prophet's reward. He who receives a righteous man in the name of a righteous man will receive a righteous man's reward.
42
Whoever gives one of these little ones just a cup of cold water to drink in the name of a disciple, most certainly I tell you he will in no way lose his reward."