Dhikr

S 15:6 And they have said: The one whom the dhikr has been sent down upon, you are jinni-possessed.

S 15:9 We have sent down the dhikr and we are keepers for it.

S 16:43-44 And we did not send before you but men. We inspire them. So ask the people of the Dhikr if you do not know. With the proofs and the Zubur. And we sent down to you the Dhikr to make clear for people what has been sent down to them and perhaps they will ponder.

Proofs?

Zabur/Zubur

[18:83 And they ask you about Dhul Qarnayn. Say: I shall read to you a remembrance of him.] Or a dhikr of him.

Dhul-Qarnayn and the Alexander Romance - WikiIslam

[19:2 A remembrance of your lord’s mercy, his slave Zakariyya,] Or a dhikr of your lord's mercy]

S 21:2 No dhikr produced from their lord comes to them but they have listened to it while they play,

S 21:7 And we did not send before you except men; we inspire them. So ask the People of the Dhikr if you do not know.

'We inspire them'. They must be alive.

People of the Dhikr

S 21:10 We have sent down to you a book wherein is your dhikr. So do you not comprehend?

S 21:24 Or have they taken gods instead of him? Say: Bring your proof. This is a dhikr of him with me and a dhikr of him before me. But most of them do not know the truth so they are averse.

S 21:48 And we gave Musa and Harun the Furqan and a brightness and a dhikr for the fearers.

S 21:50 And this is a blessed dhikr which we have sent down. So are you deniers of it?

S 21:105 And we wrote in the Zabur after the Dhikr: The Earth, my righteous slaves inherit it. (Thought to be based on Psalm 37:29: The righteous shall inherit the land, and dwell therein for ever.)

S 25:18 They said: Glory be to you! It was not behoving for us to take instead of you any protectors. But you amused them and their fathers until they forgot the dhikr and were a fallow people.

S 25:29 He misguided me from the dhikr after it had come to me. And the Devil was a deserter to man.

S 36:11 You only warn him who has followed the dhikr and feared Al-Rahman in the ghayb. So give him good news of forgiveness and a generous wage.

Regarding Al-Rahman: Altafsir.com - The Tafsirs - التفاسير

The Ghayb

S 38:8 Has the dhikr been sent down upon him from among us? Rather, they are in doubt about my dhikr. Rather, they have not yet tasted torture.

S 39:23 Allah has sent down the best hadith, a book, resembling, a repeated thing. The skins of those who fear their lord shiver from it then their skins and their hearts relax at Allah’s dhikr. That is Allah’s guidance. He guides therewith whom he wills. And whom Allah misguides there is no guide for him.

The Best Hadith

S 43:5 So should we strike from you the Dhikr, as remission, because you were an extravagant people?

S 54:25 Was the Dhikr thrown upon him from among us? Rather, he is an untruthful liar.

S 68:51 And those who have disbelieved would almost make you slip by their eyesight when they have heard the dhikr and they say: He is jinni-possessed.

S 68:52 And it is nothing but a dhikr for the ‘alamin.

S 77:5 And Al-Mulqiyat of a dhikr

Quran speaks of a dhikr and of the dhikr. What might the difference be?