Sunan an-Nasa’i – Hadith No : 1214

It was narrated from Mutarrif that his father said: “I came to the Prophet (ﷺ) when he was praying, and there was a sound coming from his chest like the sound of water boiling,” meaning, he was weeping.

Hadith In Arabic Text :

أخبرنا سويد بن نصر، قال أنبأنا عبد الله، عن حماد بن سلمة، عن ثابت البناني، عن مطرف، عن أبيه، قال أتيت النبي صلى الله عليه وسلم وهو يصلي ولجوفه أزيز كأزيز المرجل يعني يبكي ‏.‏

Chapter : The Book of Forgetfulness (In Prayer) – كتاب السهو