John Wesley on Exodus 23:9

Thou shalt not oppress the stranger - Though aliens might not inherit lands among them; yet they must have justice done them. It was an instance of the equity of our law, that if an alien be tried for any crime except treason, the one half of his jury, if he desire it, shall be foreigners; a kind provision that strangers may not be oppressed. For ye know the heart of a stranger - You know something of the griefs and fears of a stranger by sad experience.