The Messenger of Allah (s.a.w.a.) said: Fatima (s.a.) is the blood inside my heart; her sons are the fruits of my heart; her husband is my eyesight; the Imams from her sons are my Lord’s emissaries, and they are His extended rope between Him and His creatures. Those who hold onto this rope will survive and those who do not will fall.
Maqtal al-Husain v 1 p 59 Ghaayah al-Maraam p 46 Behaar al-Anwaar v 3 p 100 Ehqaq al-Haqq v 13 p 79