Matthew 5:30

5:30 If your right hand causes you to sin, cut it off and throw it away! It is better to lose one of your members than to have your whole body go into hell.

Matthew 18:6

18:6 “But if anyone causes one of these little ones who believe in me to sin, ¹  it would be better for him to have a huge millstone ²  hung around his neck and to be drowned in the open sea. ³ 

[18:6]  ¹ tn The Greek term σκανδαλίζω (skandalizw), translated here “causes to sin” can also be translated “offends” or “causes to stumble.”

[18:6]  ² tn Grk “the millstone of a donkey.” This refers to a large flat stone turned by a donkey in the process of grinding grain (BDAG 661 s.v. μύλος 2; L&N 7.68-69). The same term is used in the parallel account in Mark 9:42.

[18:6]  ³ tn The term translated “open” here (πελάγει, pelagei) refers to the open sea as opposed to a stretch of water near a coastline (BDAG 794 s.v. πέλαγος). A similar English expression would be “the high seas.”