And if he trespass against thee seven times in a day,.... For good men are frequently apt to fall into sin, and offend both God and man; see Proverbs 24:16 "and seven times in a day turn again to thee, saying, I repent"; as often as he sins, and appears to be truly sensible of it, and humble for it, and makes acknowledgments of it; and not only barely in words professes his concern for it, but there is reason to believe that he is heartily grieved for it, and to hope that he will behave better for the future:
thou shalt forgive him; this seems to be occasioned by Peter's putting such a question to Christ, how often a brother might sin against him, and he forgive him; see Matthew 18:21. The Jews plead for great tenderness and readiness to forgive penitents, when they ask for forgiveness; which they insist upon should be done: they say (q),
"it is forbidden an injured person to be cruel, and not forgive; this is not the way of the seed of Israel: but when he that has done the injury asks of him, and prays him once and again, and he knows that he has returned from his sin, and hath repented of his evil, he ought to forgive him; and whoever makes haste to forgive, is praiseworthy.''
But then, they say (r),
"if he brings all the rams of Nebaioth that are in the world, he is not to have pardon, unless he asks it of him.''
And they seem also to have set times for it, as well as restrain the frequent repetition of it: they observe (s);
"if a man returns by repentance, in the intermediate time, (i.e. as the gloss explains it, between the beginning of the year, or New Year's Day, and the day of atonement,) they pardon him; but if he does not return in the intermediate time, though he brings all the rams of Nebaioth in the world, they do not pardon him.''
A man that was always forgiving, was reckoned by them an extraordinary man: it is said (t) of Mark Zutra bar Nachman, that he was , "forgiving every day"; but yet they do not seem to care to carry it to so great a length, and to repeat it so often as our Lord directs; they allow a man to forgive three times, but not a fourth; See Gill on Matthew 18:22.
(q) Maimon. Hilchot Chobel Umezik, c. 5. sect. 10. (r) T. Bab. Bava Kama, fol. 92. 1. (s) T. Bab. Rosh Hashama, fol. 17. 2. (t) Juchasin, fol. 90. 2.

seven times--not a lower measure of the forgiving spirit than the "seventy times seven" enjoined on Peter, which was occasioned by his asking if he was to stop at seven times. "No," is the virtual answer, "though it come to seventy times that number, if only he ask forgiveness in sincerity."

If he sin against thee seven times in a day, and seven times in a day return, saying, I repent - That is, if he give sufficient proof that he does really repent, after having sinned ever so often, receive him just as if he had never sinned against thee. But this forgiveness is due only to real penitents. In a lower sense we are to forgive all, penitent or impenitent; (so as to bear them the sincerest good will, and to do them all the good we can;) and that not seven times only, but seventy times seven.