Rashi on Deuteronomy 32:30/רש"י על דברים ל״ב:ל׳

1איכה ירדף אחד HOW ONE MAN of the nations COULD PURSUE אלף A THOUSAND of the Israelites.

2אם לא כי צורם מכרם EXCEPT THAT THEIR ROCK HAD DELIVERED THEM — sold them and delivered them into our hands, 'delivrer' in old French (Eng. = deliver).