"Lev 19:17. thou shalt in any wise rebuke thy neighbour—Instead of cherishing latent feelings of malice or meditating purposes of revenge against a person who has committed an insult or injury against them, God’s people were taught to remonstrate with the offender and endeavor, by calm and kindly reason, to bring him to a sense of his fault.
not suffer sin upon him—literally, “that ye may not participate in his sin.”" Jamieson, R., Fausset, A. R., & Brown, D. (1997). Commentary Critical and Explanatory on the Whole Bible (Vol. 1, p. 87). Oak Harbor, WA: Logos Research Systems, Inc.
"Lk 23:34 forgive them. I.e., His tormentors, both Jews and Romans (cf. Acts 7:60). Some of the fruit of this prayer can be in the salvation of thousands of people in Jerusalem at Pentecost (Acts 2:41). they do not know what they do. I.e., they were not aware of the full scope of their wickedness. They did not recognize Him as the true Messiah (Acts 13:27, 28). They were blind to the light of divine truth, “For if they had understood it, they would not have crucified the Lord of glory” (1 Cor. 2:8). Still, their ignorance certainly did not mean that they deserved forgiveness; rather, their spiritual blindness itself was a manifestation of their guilt (John 3:19). But Christ’s prayer while they were in the very act of mocking Him is an expression of the boundless compassion of divine grace." MacArthur, J., Jr. (Ed.). (1997). The MacArthur Study Bible (electronic ed., p. 1564). Nashville, TN: Word Pub.