Adam Clarke on Judges 6:15

Wherewith shall I save Israel? - I have neither men nor money.

Behold, my family is poor in Manasseh - הנה אלפי הדל, Behold, my thousand is impoverished. Tribes were anciently divided into tens, and fifties, and hundreds, and thousands; the thousands therefore marked grand divisions, and consequently numerous families; Gideon here intimates that the families of which he made a part were very much diminished. But if we take אלפי alpey for the contracted form of the plural, which is frequently in Hebrew nouns joined with a verb in the singular, then the translation will be, "The thousands in Manasseh are thinned;" i.e., this tribe is greatly reduced, and can do little against their enemies.