Sahih al-Bukhari
Sahih al-Bukhari 2999
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا يَحْيَى، عَنْ هِشَامٍ، قَالَ أَخْبَرَنِي أَبِي قَالَ، سُئِلَ أُسَامَةُ بْنُ زَيْدٍ ـ رضى الله عنهما ـ كَانَ يَحْيَى يَقُولُ وَأَنَا أَسْمَعُ فَسَقَطَ عَنِّي ـ عَنْ مَسِيرِ النَّبِيِّ صلى الله عليه وسلم فِي حَجَّةِ الْوَدَاعِ، قَالَ فَكَانَ يَسِيرُ الْعَنَقَ، فَإِذَا وَجَدَ فَجْوَةً نَصَّ. وَالنَّصُّ فَوْقَ الْعَنَقِ.
Muhammad ibn al-Muthanna narrated to us; Yahya narrated to us from Hisham, who said: My father informed me that Usama ibn Zayd (may Allah be pleased with them both) was asked about the Prophet's pace of travel during the Farewell Pilgrimage. Yahya used to say, ‘I was listening, then part of it escaped me.’ Usama said: He traveled at a brisk pace, and whenever he found an open stretch, he went at full pace. Full pace is faster than the brisk pace.
Translation notes
سُئِلَ أُسَامَةُ بْنُ زَيْدٍ ـ رضى الله عنهما ـ كَانَ يَحْيَى يَقُولُ وَأَنَا أَسْمَعُ فَسَقَطَ عَنِّي ـ عَنْ مَسِيرِ النَّبِيِّ صلى الله عليه وسلم فِي حَجَّةِ الْوَدَاعِ،
The narrator explicitly notes that a portion of the report escaped him; this interruption may affect the completeness of the pace description.
Confirm that this transmission caveat is retained and whether more of the omitted phrase can be established from this source.