sentences:  Umm Al-Rihan had a population of 26, all Muslims.The wood near the village is the site of a memorial to early Palestinian militant leader Izz ad-Din al-Qassam of the Black Hand, killed in a gunfight with the British Palestine Police Force.In the 1945 statistics, the population of Umm ar-Rihan was counted with that of Ya'bad, in an official land and population survey.