What may not be done during Prayer and what is permitted - Section 2 Mishkat al-Masabih 1000

Arabic hadith text
وَعَنْ مُطَرِّفِ بْنِ عَبْدِ اللَّهِ بْنِ الشِّخِّيرِ عَنْ أَبِيهِ قَالَ: أَتَيْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَهُوَ يُصَلِّي وَلِجَوْفِهِ أَزِيزٌ كَأَزِيزِ الْمِرْجَلِ يَعْنِي: يَبْكِي وَفِي رِوَايَةٍ قَالَ: رَأَيْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي وَفِي صَدْرِهِ أَزِيزٌ كَأَزِيزِ الرَّحَا مِنَ الْبُكَاءِ. رَوَاهُ أَحْمَدُ وَرَوَى النَّسَائِيُّ الرِّوَايَةَ الْأُولَى وَأَبُو دَاوُدَ الثَّانِيَة
Translation

Mutarrif b. ‘Abdallah [b.] ash-Shikhkhir quoted his father as saying, “I came to the Prophet when he was engaged in prayer, and heard a sound from within him like the bubbling of a pot,” meaning that he was weeping. In a version he said, “I saw the Prophet praying and a sound came from his breast like the rumbling of a mill, owing to weeping.”Ahmad transmitted it. Nasa’i transmitted the first version and Abu Dawud the second.