Ibliss he was very truthful to God before Adam. My question does Ibliss still pray to Allah or has he stopped?
To Worship is to submit willingly or unwillingly to the Worshipped (Allah).
By abiding to what He commanded, doing what He enjoins, and avoiding what He forbids.
Commands of Allah are for goodness of Mankind and Jinn, on a personal level for them, or a mass/public level.
In other words, worshipping Allah, shall result in goodness to oneself level or society level.
Ibadaat (Worshipping) is counted as obedience if done willingly.
Prayer is an example of personal worship act. That must be done willingly to be rewarded.
Shaytan Believes in Allah but is Fasiq (disobedient)
Shaytan witnessed the command to prostrate to Adam, was addressed by Allah, and is fully aware that Allah is creator. no doubts here, but he disobeyed Allah! and chose not to abide! Allah described him as fasiq.
18:50 And [mention] when We said to the angels, "Prostrate to Adam," and they prostrated, except for Iblees. He was of the jinn and departed from the command of his Lord. Then will you take him and his descendants as allies other than Me while they are enemies to you? Wretched it is for the wrongdoers as an exchange.
Two Types of Worshipping
This is done because you want to abide by what Allah commanded. you're rewarded for, and questioned if broke it. it has two categories:
Ibadaat on personal level, that affect you directly
Like fasting, prayer.. etc.
Ibadaat with effect on the Muslim nation
has a greater reward
Like zakat, sponsoring Orphans, spreading knowledge...etc
No reward for this type
Allah, Exalted He is, owns this universe, and what therein, everything does recognise and obeys its Lord, the body of an infidel is not his! if Allah wills He can command it to stop, die, or vanish. planets, trees, oceans, every single atom obeys, i.e worships, this is by compulsion or willingly.
e.g. prostration (ibaada)
13-15 And to Allah prostrates whoever is within the heavens and the earth, willingly or by compulsion, and their shadows [as well] in the mornings and the afternoons.
16:49 And to Allah prostrates whatever is in the heavens and whatever is on the earth of creatures, and the angels [as well], and they are not arrogant.
Exalting Him, another Ibaada
17:44 The seven heavens and the earth and whatever is in them exalt Him. And there is not a thing except that it exalts [ Allah ] by His praise, but you do not understand their [way of] exalting. Indeed, He is ever Forbearing and Forgiving.
Shaytan doesn't pray (willingly), as he is fasiq, how can he pray if the prayer is meant to enjoin goodness and forbid evil ?
29:45 Recite, [O Muhammad], what has been revealed to you of the Book and establish prayer. Indeed, prayer prohibits immorality and wrongdoing, and the remembrance of Allah is greater. And Allah knows that which you do.
And Allah knows best.