What is the fate of the infidel’s child who died before puberty, and will he intercede for his infidel parents? And does Allah’s mercy include the infidel on the Day of Resurrection, knowing that our deeds will not admit us into Paradise except by His mercy?

It was previously explained what the scholars said about the children of disbelievers who died before puberty. As for their intercession for their disbelieving parents, no, because intercession for disbelievers is negated. Although Allah's mercy encompasses all things, He, the Exalted, reserves it in the Hereafter for His believing servants, as He states: "And My mercy encompasses all things, but I will decree it [especially] for those who fear Me and give zakah and those who believe in Our verses." Therefore, disbelievers are not encompassed by Allah's mercy in the Hereafter, nor will they enter Paradise if they die upon disbelief. The Hadith about the prostitute woman from Bani Israel does not state that she was a disbeliever; rather, it appears that she was upon Allah's law in her time.