''Chasidei Umos HaOlam'' is the Hebrew term used by Maimonides in the Laws of Kings 8:11. It is generally translated as "Righteous Gentile". They are the "Observant Noahites". The term indicates non-Jews who have taken upon themselves the observance of [[Noahide Law]], and do this ''because it was revealed through [[Moshe Rabbenu]]'' as explained by Jewish tradition. According to Maimonides, Chasidei Umos HaOlam are assured a portion in the world to come. This is something that is not assured for the ''[[Chochmei Umos HaOlam]]'' who also observe [[Noahide Law]], but do it for their own rational reasons rather than out of belief in Judaism. No one may be counted among the Hassidei Umot HaOlam unless through a system which was established by the Chazal while the Jubilee was still in effect (i.e. before 135CE).
The Judeo-Arabic sources refer to them as מו֞מןor مؤمنون.
