Wujoob

مَا يُثَابُ فَاعِلُهُ وَيُعَاقِبُ تَارِكُهُ That which a person who does it rewarded and one who abandons it is punished. (Taken from Sharh al Usoolith Thalaathah by Shaykh Saalih al Fawzaan) For a longer explanation in pdf format CLICK HERE