What is the ruling on swearing on the Quran, by saying: "You bitch, you wretched one, my Lord will bring it upon you and not upon me, if I speak and spy on you," in a state of extreme anger, unconsciousness, and ignorance?

What the daughter-in-law did, accusing her mother-in-law of spying and attributing words to her that she did not say, is a sin requiring repentance and seeking forgiveness from her. Likewise, the mother-in-law's cursing of her daughter-in-law by saying: "You dog, you cursed one," is a sin and an injustice that is impermissible. As for the mother-in-law's statement, "May God bring it upon you," it is a permissible supplication against an oppressor, though patience is more virtuous.