Sefer Ha’mitzvos Ha’Katzar (The concise book of mitzvos) By the Chofetz Chaim
This book lists the Torah mitzvos that can be observed today
Second Section – the Negative Commandments
46. It is a negative commandment “Do not curse one’s Father or Mother.”
As it states in Shemos (Exodus) 21:17, “A person that curses his father or his mother shall be put to death.” If he curses his father or mother using the Name of G-d, he deserves the death penalty of stoning. This is true even if he curses them after their death. If he curses them with a characteristic name of G-d, he is whipped. One should not make his father swear by using a curse. Nor should he be the messenger from a court to excommunicate him. It is forbidden to embarrass one’s parents, because anyone that embarrasses his father or his mother, even by a hint, is cursed from the Mouth of the Almighty, as it states in Devarim (Deuteronomy) 27:17, “Cursed is the one that dishonors his father or his mother.”
This applies in all places and at all times, for men and for women.
4. Be kind to yourself. Speaking badly even about yourself is unethical.
הלכות שמירת הלשון 