He replied: I first recite tashahhud (supplication recited in sitting position), and then I say: O Allah, I ask You for Paradise, and I seek refuge in You from Hell-Fire, but I do not understand your sound and the sound of Mu'adh (what you say or he says in prayer). The Prophet (ﷺ) said: We too go around it (paradise and Hell-fire).
In-book : Book 2, Hadith 402
English translation : Book 3, Hadith 792