'Foreign' in the Bible

Then she gave birth to a son, and he named him Gershom, for he said, “I have been a sojourner in a foreign land.”

and her two sons, of whom one was named Gershom, for Moses said, “I have been a sojourner in a foreign land.”

If she is displeasing in the eyes of her master who designated her for himself, then he shall let her be redeemed. He does not have authority to sell her to a foreign people because of his unfairness to her.