Hadith #2854 (Sahih al-Bukhari)
Book: Fighting for the Cause of Allah (Jihaad)
Narrator(s): Nafi' bin 'Abbas/'Ayyash نافع بن عباس/بن عياش الأقرع
Grade: Sahih

I heard Al Abbas telling Az-Zubair, “The Prophet (ﷺ) ordered you to fix the flag here.”

Source: https://parallelquran.com/hadith/sahih-al-bukhari-2854/