why 72 virgins?

How many virgins do I get when I die?
According to these traditions, Muslim men that die waging jihad against the enemies of Islam will be rewarded by Allah in heaven (jannah) as martyrs (shuhada) and receive seventy-two virgins to enjoy in blissful ecstasy.
Full answer in: link.springer.com
What does Allah promise in heaven?
Allah has promised the believing men and women gardens with rivers flowing under them, and fine dwellings in the Gardens of Eden. Feb 28, 2015
Full answer in: www.southcoasttoday.com
What is a Houri in Islam?
Houri, also spelled huri, Arabic Ḥawrāʾ, plural Ḥūr, in Islām, a beautiful maiden who awaits the devout Muslim in paradise. The Arabic word ḥawrāʾ signifies the contrast of the clear white of the eye to the blackness of the iris.
Full answer in: www.britannica.com
More questions like: What is a Houri in Islam?
Where does the idea of 72 virgins come from?
Reference to " 72 virgins "
The hadith of 72 Virgins is found in Jami' al-Tirmidhi which was recorded 252 years after the death of Muhammad.
Full answer in: en.wikipedia.org