At a feast, Rabbi served his disciples tender and tough cuts of beef tongue. When his disciples chose the tender over the tough, Rabbi instructed them so to let their tongues be tender to one another. Rabbi taught that this was the meaning of when Moses admonished: "And if you sell anything . . . you shall not wrong one another." Similarly, a Midrash concluded that these words of taught that anyone who wrongs a neighbor with words will be punished according to Scripture.