Horses and chariots are not particularly suitable for fighting in the hilly areas of Israel, though they were effective on the plains.1 By hamstringing the horses so that he has a limited number to use, David testifies to his trust in the Lord rather than military might (see also Deuteronomy 17:16).2
4 David lui prit mille sept cents cavaliers et vingt mille hommes de pied; il coupa les jarrets à tous les chevaux de trait, et ne conserva que cent attelages.