Al-Tawḥīd > The Explanation of the Words of the Calls to Prayer
Hadith #2

2 - وقد روي في خبر آخر أن الصادق عليه السلام سئل عن معنى (حي على خير العمل) فقال: خير العمل الولاية. وفي خبر آخر خير العمل بر فاطمة وولدها عليهم السلام (١). باب تفسير الهدى والضلالة والتوفيق والخذلان من الله تعالى

2. It has been narrated in another tradition that Al-Sadiq (AS) was asked about the meaning of `hasten to the best of deeds;’ Hence he replied: “The best of the deeds is the Guardianship [al-wilayah].” In another tradition the best of deeds is said to be kindness towards Fatimah and her children (AS).