A deleted post from a long time ago made the claim that [W]e are [allowed to charge interest to other Jews] but not from immediate family. Even from another Jew, if he or she is not a member ...
What is the source for the prohibition against Nivul Peh (using foul language)? Is it Biblical? Rabbinic? "Asmachta" (based on a principle derived from the Torah but ultimately not considered a ...