ציטירנדיקער פּירוש אויף דברים 7:17

עזב תעזב עמו — The root עזב has here the meaning of “helping”. It has a similar meaning in, (Deuteronomy 32:36) “assisted and helped (עזוב)”. Similar also is, (Nehemiah 3:8) “ויעזבו Jerusalem up to the wall” — i. e. they filled it up with earth in order to help and to support the strength of the wall. A similar use of כי is, (Deuteronomy 7:17, 18) כי תאמר בלבבך רבים הגוים האלה וגו׳ which means “Canst thou possibly (כי) speak thus? לא תירא מהם, Do not be afraid of them and speak thus”. Our Rabbis expounded it in a Halachic sense as follows: … כי תראה וחדלת “If thou seest etc. …וחדלת” — there are occasions when you may forbear and there are occasions when you must help. How so? If it is an old man who sees the ass in this condition and it is not compatible with his dignity to intervene, then וחדלת “thou mayest forbear” holds good; or if the animal belongs to a heathen and its burden to an Israelite then, also, וחדלת may be applied (cf. Mekhilta).

Shall you say, ‘Why should we persecute him?’ Like (Deut. 7:17), “Will you say in your heart,” in which [כי] is an expression of a question. That is to say, “Will you lay your heart to the matter to have pity and say, ‘Why should we persecute him?’”