John Mark
Mark 9:45ESV·traditional attribution

And if your foot causes you to sin, cut it off. It is better for you to enter life lame than with two feet to be thrown into hell.

Matthew Henry Presbyterian @wholebiblehenry

Here, I. Christ promiseth a reward to all those that are any way kind to his disciples (Mar 9:41); "Whosoever shall give you a cup of water, when you need it, and will be a refreshment to you, because ye belong to Christ, and are of his family, he shall not lose his reward." Note, 1.

Commenting on Mark 9:41-50

John Gill Reformed Baptist @doctorgill

Where their worm dieth not, and the fire is not quenched. The Persic version renders it, "because from thence there can be no deliverance": which is rather an interpretation of these figurative expressions, and is a good one; since they design the eternity of hell torments, as well as point at the anguish and misery of them. Where their worm dieth not, and the fire is not quenched.