“His nose fixed to the ground in prostration, never to be raised;
his gaze humbled, his ear deaf and unhearing.”

Someone asked Sahl ibn ʿAbd Allah, “Does the heart prostrate?”
He answered, “Yes— with a prostration from which it never lifts its head.”

In Surah al-Hajj the first occasion is a declarative statement:
“Do you not see that to Allah prostrates whoever is in the heavens and whoever is on the earth—the sun, the moon, the stars, the mountains, the trees, the beasts, and many people, while many are doomed to punishment? Whomever Allah humiliates, none can honor. Allah does whatever He wills” (al-Hajj 22:18).

The second instance there is a command linked to bowing, and for that reason scholars have differed about its ruling.

As for the prostration verse in Surah al-Furqan:
“When they are told, ‘Prostrate yourselves to the Most Merciful,’ they reply, ‘What is the Most Merciful? Shall we prostrate to what you command us?’ and it only increases their aversion” (al-Furqan 25:60).