Mark 9:42

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
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.
The punishment of drowning with a heavy weight attached is extremely gruesome and reflects Jesus’ views concerning those who cause others who believe in him to sin.
tied around his neck and to be thrown into the sea.
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