Kabbalah su II Samuele 12:78

He said to Dumah, 'He certainly did not know. So he waited more than three months, as four months had passed.' Because we have learned that on the twenty-fifth day of Nissan, David sent an announcement (to go to war). And they were with Yoav on the seventh day of Sivan, as they went and destroyed the land of the children of Amon. There they remained during the months of Sivan, Tammuz, Av, and Elul. And on the twenty-fourth day of Elul the event with Batsheva occurred. Then on Yom Kipur (the Day of Atonement) the Holy One, blessed be He, forgave him for that sin. And there are those who claim that on the seventh day of Adar the announcement was sent, and all arms were gathered on the fifteenth day of Iyar. So what happened with Batsheva occurred on the fifteenth day of Elul. While on Yom Kipur, he received the message "Hashem also has put away your sin; you shall not die" (II Samuel 12:13). What is the meaning of "you shall not die?" It means that he shall not die at the hand of Dumah.

Dumah said, Master of the universe, I have one thing against him! He opened his mouth and said, "as Hashem lives, the man that has done this deserves to die" (Ibid. 5). So he has condemned himself to death, and therefore I have the power over him. He said to Dumah, You have no permission, because he has already confessed in front of Me saying, 'I have sinned against Hashem' even though he did not sin. Although his sin against Uriah was (by killing him), I have written his punishment and he has accepted it! Immediately Dumah returned to his place, disappointed.

Also regarding one who protects his Brit and the punishment of one who damages it, it says in the Zohar in Lech Lecha: 404. Another continued the discussion with the verse, “Unless Hashem had been my help, my soul had soon dwelt in silence (Heb. Dumah)” (Tehilim 94:17). We have learned why Yisrael are saved from going down to Gehenom, unlike idol-worshipping nations, and are not handed over to the hands of Dumah, WHO IS THE GOVERNOR OF GEHENOM. They have merit because of the sign OF THE COVENANT. 405. Because we have learned that when a person passes from this world, hoards of Klipot fall upon him TO HURT HIM. But when they hold up their eyes and see this sign, which is the sacred covenant, they leave him and he is not handed over to the hands of Dumah to be taken down to Gehenom. Whoever is handed over to his hands shall definitely go down to Gehenom. 406. The upper and lower beings are afraid of this sign and do not inflict evil Judgments on the man who preserves it, because, by doing so, he becomes united with the Name of the Holy One, blessed be He. 407. Because David did not preserve this sign of the covenant as he should have, kingship was taken away from him and he was banished from Jerusalem. He was afraid that he would immediately be brought down to be handed over to Dumah and that he would die in the World of Truth WITHOUT MERITING SPIRITUAL LIFE. Then he was given the good news. As it is written: “Hashem also has commuted your sin, you shall not die” (II Shmuel 12:13). At that very moment he exclaimed, “Unless Hashem had been my help, my soul had soon dwelt in silence (Dumah),” MEANING THAT HE WOULD HAVE BEEN HANDED OVER TO THE ANGEL DUMAH.

With all this, we find that David accepted upon himself afflictions and fasts, as it says “My knees were week due to fasting” (Psalms 109:24), and that which he was troubled from his kingdom was because his sin was that he had Uriah killed with the sword of Ammon, as it says in the Zohar in Beresheet. But the punishment for what he sinned with Uriah was written and he accepted, meaning what Nathan the Prophet said to him “I will raise up evil against you out of your own house” (Shmuel B 12:11). One who damages his Brit must surely suffer afflictions and fasts all his life as David did.