Assalamu alaikum,
I had a chat with someone who says the parents of Muhammad (peach be upon him) will go to heaven. What exactly is the truth?
Thank you

The parents of the Prophet (peace and blessings be upon him) are the best of parents because they (may Allah's peace be upon them) conceived the best of all mankind (pbuh). Allah the Almighty has chosen the best and most purified parents for his Prophet (pbuh). The truth about the fate of the Prophet's parents is that they are saved from Hell-fire and not from among its dwellers. This is the opinion of verifiers from among the scholars of the predecessors and successors. Scholars have authored many books to prove this fact. The luminary Imam al-Suyuti authored six scholarly theses on this issue. This is likewise the opinion of the noble institution of Azhar and of Dar al-Ifta al-Missiriyah (Egypt's Fatwa House).
In his Sharh Jawharet al-Tawhid , the Grand Sheikh of al-Azhar, the luminary al-Burhan Ibrahim al-Bajouri said, "If we know that ahl-ul-fitrah [the people who did not receive the message of Islam] will be saved from Hellfire, so it is likely that the Prophet’s parents will be saved from Hell-Fire since they are from ahl-ul-fitrah. Rather, all the men and women through whose loins and wombs he was transferred will be safe from Hellfire, their faith is established, and it is established that they did not practice disbelief, immorality, or any trait of Jahiliyyah (pre-Islamic era).
Primary evidence
Allah the Almighty says, "And your movement among those who prostrate" (Qur`an 26:219).
The Prophet (pbuh), "I continued to be transferred from the loins of the pure to the wombs of the pure." There are other similar noble mutawatir [mass transmitted] hadiths."
The former Imam of Dar al-Ifta al-Missiryyah, the luminary Sheikh Mohammed Bekheit al-Muti'i issued a fatwa on this issue. He said at the end of his fatwa the ruling for whoever says that the Prophet's parents are not from the people of faith; he said, "This is a manifest error and whoever maintains this opinion is sinful and comes under the category of those who have harmed the Prophet (pbuh) though he is not deemed a kafir [disbeliever]. This is because this issue is not form among the obligations that a mukallif [morally responsible person] must abide by. This is the truth comprised in primary texts and the opinion of verifiers".