Having offered them...
Having offered them, he engaged himself in offering the recommended prayers - at times in ruku' while at other times in sajdah, and this continued till the night reached its termination. He offered his morning prayers and once again engaged himself in reciting supplications till the sun rose above the horizon whereupon he permitted himself some rest.
Waking up, he performed his ablution and was about to start his worship when I approached him and said: “How greatly you trouble yourself!” He said: “It is for achieving comfort that I endure such effort.” I said to him: “I did not see you eat anything. How do you manage to arrange for your expenses?” He said: “Allah has taken upon Himself to provide sustenance to His servants. Now do not indulge in any more of such talks.
Having spoken thus, he left.””[^6] Iblis’ Worship The Commander of the Faithfuls (a.s) said: “Take lesson from Allah's action with respect to Iblis, for He annulled all his acts of worship (because of his arrogance); he had worshipped Allah for six thousand years, and you know not if they were of the years of the world or those of the hereafter (every day of which is equivalent to fifty thousand years of this world).
And this was a consequence of a moment's disobedience (in that he considered himself to be superior to Adam and refused to prostrate before him).
So, after the Satan, is there anyone who can remain safe from Allah's punishment by being disobedient to Him?”[^7] Imam Sadiq (a.s) was asked: “For what reason did Allah respite Iblis till the 'appointed time'?” The Imam (a.s) replied: “Because of his praise and thanksgiving to Allah.” He (a.s) was asked again: “What was his praise and thanksgiving?” He (a.s) replied: “His six thousand years of worship in the heavens.” (On another occasion he (a.s) said: “He offered, in the seven heavens, a two-rak'at prayer which extended for a period of six thousand years).”[^8] Imam Sajjad The reason for Imam Sajjad (a.s) being given the title of Zainul 'abidin was that one night, as he stood for prayers in his place of worship, Satan manifested himself in the form of a huge serpent with the intention of distracting him (a.s) from his prayers.
But when the Imam (a.s) took no notice of him, the Satan approached him (a.s) and bit his big toe causing pain to run through him, but despite this act of his, the Imam (a.s) continued to remain oblivious of him and carried on with his prayers.