In the Name of Allah , the Compassionate , the Merciful
Jabir said: "I asked him: 'O' Messenger of Allah will his followers avail of him during his occultation?' He answered: 'Yes. By the One Who appointed me to prophethood, they will seek brightness from his light and will avail by devotion in his absence the same as the availing of people from the (glow of) sun when clouds cover it...'
(Ikmal-ud-Din, vol. 1, p. 253, with nearly similar meaning in Yanabir-ul-Mawaddah, p. 117)