The Master and Margarita by Mikhail Bulgakov

At the same time that consciousness left Styopa in Yalta, that is, around half past eleven in the morning, it returned to Ivan Nikolaevich Homeless, who woke up after a long and deep sleep. He spent some time pondering how it was that he had wound up in an unfamiliar room with white walls, with an astonishing night table made of some light metal, and with white blinds behind which one could sense the sun.

Ivan shook his head, ascertained that it did not ache, and remembered that he was in a clinic. This thought drew after it the remembrance of Berlioz's death, but today it did not provoke a strong shock in Ivan. Having had a good sleep, Ivan Nikolaevich became calmer and began to think more clearly. After lying motionless for some time in this most clean, soft and comfortable spring bed, Ivan noticed a bell button beside him. From a habit of touching things needlessly, Ivan pressed it. He expected the pressing of the button to be followed by some ringing or appearance, but something entirely different happened. A frosted glass cylinder with the word ‘Drink' on it lit up at the foot of Ivan's bed. After pausing for a while, the cylinder began to rotate until the word 'Nurse' popped out. It goes without saying that the clever cylinder amazed Ivan. The word ‘Nurse' was replaced by the words 'Call the Doctor.‘