Halakhah sa Deuteronomio 19:14: Sefer Chasidim, Mishneh Torah, Negative Mitzvot, Shulchan Arukh, Yoreh De'ah & Sefer HaChinukh

He who changes time honored customs ¹J. T. Erubin 3:9. such as hymns and poetical insertions that all are accustomed to recite such as “God is unchanging” the poetical insert of the Kalir²This is not the Kalir. It is Samuel the Babylonian. which is the custom to recite, but he recited other poetical selections, he transgresses the injunctions “Remove not the ancient landmark, which thy fathers have set” (Prov. 22:28) and “Thou shalt not remove thy neighbors landmark, which they of old time have set” (Deut. 19:14).

Not to remove landmarks, as it is said, “Thou shalt not remove thy neighbour’s landmark” (Deut. 19:14).

Not to wrong any one in speech, as it is said, “Ye shall not wrong one another” (ibid. 25:17). This refers to wronging in speech^*Maimonides, in his Sefer-Ha-Mitzvoth (Prohibition 251), explains it as annoying one by sneers or reproaches..