This saying about causing little believing children to sin or stumble can also be found in Matthew, chapter 18:6, and Luke, chapter 17:1-2, with some minor changes. Mark indicated that Jesus said that if anyone of them caused these little ones, who believed in him, to be scandalized or stumble on a block (Καὶ ὃς δ’ ἂν σκανδαλίσῃ ἕνα τῶν μικρῶν τούτων τῶν πιστευόντων), it would be better for them (καλόν ἐστιν αὐτῷ μᾶλλον) to fasten a great heavy millstone around their necks (εἰ περίκειται μύλος ὀνικὸς περὶ τὸν τράχηλον αὐτοῦ). They should be thrown or cast into the deep sea (καὶ βέβληται εἰς τὴν θάλασσαν). Causing the believing little children to sin meant it was better for that person to die in deep water with a heavy millstone around their neck. This millstone was a stone for grinding various grains.
Matthew continued with his emphasis of Jesus talking about a loss of a limb that was considered like a martyrdom. Once again, Matthew was dependent on Mark, chapter 9:43-48, and repeated this in chapter 18:8-9 of this work. This time it is the right hand (καὶ εἰ ἡ δεξιά σου χεὶρ) that is causing you to stumble or sin (σκανδαλίζει σε,). Then you should cut it off (ἔκκοψον αὐτὴν) and throw it away (καὶ βάλε ἀπὸ σοῦ). Just like in the preceding verse the reasoning was the same. This self-mutilation was better for you (συμφέρει γάρ σοι). It was better to lose one of your member parts (ἵνα ἀπόληται ἓν τῶν μελῶν σου) than have your whole body be thrown into Gehenna or hell (καὶ μὴ ὅλον τὸ σῶμά σου εἰς γέενναν ἀπέλθῃ). There is a different Greek verb used here that means to be thrown or cast into hell. The Greek word for hell “γέενναν” or the English Gehenna was based on the Hebrew word Gehinnom that was the name of the valley south of Jerusalem where burning child sacrifices would take place. You were better off with one hand and a whole body than being in the fires of hell. Notice the emphasis on the right side, obviously a right-handed society. Perhaps the right hand was the hand that did violence to others, as in killing.