All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
Jannah (Paradise), the houris who are in it, and other manifestations of the bliss conferred upon its inhabitants are matters of the Unseen, the knowledge of which is exclusive to Allah, The Exalted. Accordingly, they can be established only by divine revelation, i.e. reports of the Quran and Sunnah.
With regard to the first question, we did not find any basis for what is mentioned in it. Al-Haafith Ibn Hajar, may Allaah have mercy upon him, made mention of the number in your second question in his book Fat-h Al-Baari. He said: “The largest number I came across in this regard was what Abu Ash-Shaykh reported in Al-‘Athamah and Al-Bayhaqi in Al-Ba‘th on the authority of ‘Abdullaah ibn Abu Awfa, that the Prophet, sallallaahu ‘alayhi wa sallam, said: ‘Every man from the people of Paradise will marry five hundred houris, or that he will go around to four thousand virgins and eight thousand non-virgin women.’ There is an unnamed narrator in its chain of narration.” [End of Quote] This means that the Hadeeth is inauthentic. There is no mention of the inmate in it.
As for the third question, regarding the martyr marrying seventy-two houris, this was established by the Hadeeth narrated by At-Tirmithi and Ibn Maajah that the Messenger of Allah, sallallaahu ‘alayhi wa sallam, said: “Allah grants the martyr six privileges … he will have seventy-two wives of Al-Hoor Al-‘Een (houris)...” [Saheeh (authentic)]
As for the fourth question, that each man amongst the inhabitants of Paradise will receive at least two houris, then the scholars mentioned that there were different narrations reported in this regard from which it could be concluded that he will have at least two wives from the women of this worldly life and at least seventy houris. This was mentioned by Al-‘Iraaqi in Tarh At-Tathreeb and Al-Mubaarakpoori, may Allaah have mercy upon him, in Tuhfat Al-Ahwathi.
For more benefit on the number of Hooris each man will get in Paradise, please refer to Fatwa 287017.
Allah Knows best.