We have already mentioned a similar Reference where Ibn Taimiyya mentioned a Narration from Sunan Tirmidhi, which was not present in it. Here is the LINK

Let us now show You a Narration He mentioned from Saheeh Bukhari. He writes in Minhaj Us Sunnah, 4/544

وَفِي صَحِيحِ الْبُخَارِيِّ عَنِ ابْنِ عُمَرَ – رَضِيَ اللَّهُ عَنْهُمَا، – عَنِ النَّبِيِّ – صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ – أَنَّهُ قَالَ: ” «أَوَّلُ جَيْشٍ يَغْزُو الْقُسْطَنْطِينِيَّةَ مَغْفُورٌ لَهُمْ» ” (4) 

And in Saheeh Bukhari, from Ibn Umar from Holy Prophet: The first army to fight for Qastantunia are forgiven

Researcher of the book, Rashad Salim writes in footnote 4

) سَيَرِدُ هَذَا الْحَدِيثُ مَرَّةً أُخْرَى فِي هَذَا الْجُزْءِ ص 572 إِنْ شَاءَ اللَّهُ فَانْظُرْ كَلَامِي عَلَيْهِ هُنَاكَ.

The Narration is mentioned again in this Volume, Page 572, and You will see my Opinion on it there

When we refer to P. 572, We find Him writing

لَمْ أَجِدِ الْحَدِيثَ بِهَذَا اللَّفْظِ وَلَكِنْ وَجَدْتُ عَنْ عُبَادَةَ بْنِ الصَّامِتِ – رَضِيَ اللَّهُ عَنْهُ – الْحَدِيثَ فِي: الْبُخَارِيِّ 4/42

I do not find This Narration with These words,  but We get from I’bada bin Samit in Hadeeth, in Bukhari, 4/42