Matthew
Matthew 18:8ESV·traditional attribution

And if your hand or your foot causes you to sin, cut it off and throw it away. It is better for you to enter life crippled or lame than with two hands or two feet to be thrown into the eternal fire.

Matthew Henry Presbyterian @wholebiblehenry

As there never was a greater pattern of humility, so there never was a greater preacher of it, than Christ; he took all occasions to command it, to commend it, to his disciples and followers. I. The occasion of this discourse concerning humility was an unbecoming contest among the disciples for precedency; they came to him, saying, among themselves (for they were ashamed to ask...

Commenting on Matthew 18:1-35

John Gill Reformed Baptist @doctorgill

Wherefore if thy hand or thy foot,.... The same words are repeated here on occasion of offences, as are spoken by Christ, Mat 5:29 on account of unchaste looks, desires and lusts: giving offence to Christ's disciples, or endeavouring, by any means whatever, to cause them to stumble and fall, is equally gratifying the flesh, and no more to be indulged, than the other, on pain of eternal damnation.

Albert Barnes Presbyterian @notesbybarnes

Verse 8,9. If thy hand, etc. . The meaning of all these instances is the same. Temptations to sin, attachments, and employments of any kind that cannot be pursued without leading us into sin, be they ever so dear to us, must be abandoned, or the soul must be lost. It is better for thee to enter into life halt or maimed-with one eye, etc.