How sound is the Hadith which states that the Prophet, peace and blessings be upon him, weighed himself against ten and one hundred of his Ummah, and he outweighed them, and that if he were to be weighed against his entire Ummah, he would outweigh them, and what is meant by "weighing" in this context?

Ibn Kathir said about the aforementioned hadith (definition): "Its chain of narration is good and strong," and Al-Albani authenticated it. Scholars differed regarding what will be weighed on the Day of Resurrection: Is it the deeds, or the scrolls of deeds, or the doer himself? The evidence proves the weighing of all three, which is what Sheikh Hafiz al-Hakami preferred, saying: "What is apparent from the texts — and Allah knows best — is that the doer, his deed, and the scroll of his deed, all of these will be weighed; because the hadiths that explain the Qur'an have been narrated concerning each of these, and there is no contradiction between them."