Jabir b. Abdullah Ansari: I entered the Kufa Mosque to find Ameerul Momineen (a.s.) writing something with his finger and smiling at the same time. I asked: O Ameerul Momineen (a.s.), what is the reason behind your smile? He replied: I am astonished at the one who reads this verse but is not cognizant about its meaning in way it deserves to be. I asked: Which verse, O Ameerul Momineen (a.s.)? He said: Allah is the Light of the heavens and the earth; a likeness of His Light is as a niche…
The ‘niche’ is Muhammad (s.a.w.a.).
“in which is a lamp,”
I am the lamp.
“the lamp is in a glass,”
The glass is Hasan (a.s.) and Husain (a.s.).
“(and) the glass is as it were a brightly shining star,”