Mark 12:31

12:31 The second is: ‘Love your neighbor as yourself.’ ¹  There is no other commandment greater than these.”

Mark 9:42

9:42 “If anyone causes one of these little ones who believe in me to sin, it would be better for him to have a huge millstone ²  tied around his neck and to be thrown into the sea.

[12:31]  ¹ sn A quotation from Lev 19:18.

[9:42]  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 Matt 18:6.