The ruling on adding "and His blessings" to the closing salam of the prayer

Question:
Adding "and His blessings"?

Answer:
It is anomalous, anomalous; because there is a problem with the narration, it is weak, and the preserved version is "and the mercy of Allah," as in the hadith of Ibn Mas'ud, Samurah ibn Jundub, and Sa'd ibn Abi Waqqas.
Al-Hakim (may Allah have mercy on him) graded it as authentic, but there is a point of concern regarding its authenticity; because it is narrated by 'Uqbah... 'Uqbah's narration from his father is via an interrupted chain (an'anah), and he did not hear it from him; for this reason, Ibn Ma'in and a group of scholars said: "He did not hear from his father." Others said: "He heard some things from his father" . And it is reported in some of Muslim's narrations that he heard from his father.