In the verse before, those who deny ask for a miracle they can see with their eyes.
The answer points to no sign outside; it points to a state within the heart: settling.

The verb tatmainnu speaks of finding stillness, of settling into place and coming to rest.
As long as the heart has not found what it seeks, it runs from one thing to the next; remembrance brings it back to where it stands still.

The verse begins with “alâ,” calling for attention; the hadith began the same way.
Both call the listener to the same place.