Mustahabb (Arabic: مستحبّ /mustaḥabb/, literally "recommended") is an Islamic term referring to recommended, favored or virtuous actions.
Mustahabb actions are those whose status of approval in Islamic law (ahkam) falls between mubah (neither encouraged nor discouraged) and wajib (compulsory). One definition is "duties recommended, but not essential; fulfilment of which is rewarded, though they may be neglected without punishment". Synonyms of mustahabb include masnun and mandub. The opposite of mustahabb is makruh (discouraged).