question #1 Sahih al-Bukhari 1246, Book 23, Hadith 9 : What emotions did the Prophet Muhammad (ﷺ) express upon hearing about the martyrdom of his companions?

The Prophet (ﷺ) said, “Zaid took over the flag and was martyred. Then it was taken by Jafar who was
martyred as well. Then `Abdullah bin Rawaha took the flag but he too was martyred and at that time
the eyes of Allah’s Messenger (ﷺ) were full of tears. Then Khalid bin Al-Walid took the flag without being
nominated as a chief (before hand) and was blessed with victory.”