Luke 17:1-3

Jesus said to His disciples, “Stumbling blocks [temptations and traps set to lure one to sin] are sure to come, but woe (judgment is coming) to him through whom they come! [Matt 18:7] It would be better for him if a millstone [as large as one turned by a donkey] were hung around his neck and he were hurled into the sea, than for him to cause one of these little ones to stumble [in sin and lose faith]. [Matt 18:6; Mark 9:42] Pay attention and always be on guard [looking out for one another]! If your brother sins and disregards God’s precepts, solemnly warn him; and if he repents and changes, forgive him.