question #2 Sahih al-Bukhari 6394, Book 80, Hadith 89 : How did the Prophet express his grief and seek divine intervention after the loss of his companions?

The Prophet (ﷺ) sent a Sariya (an army detachment) consisting of men called Al-Qurra’, and all of them
were martyred. I had never seen the Prophet (ﷺ) so sad over anything as he was over them. So he said
Qunut (invocation in the prayer) for one month in the Fajr prayer, invoking for Allah’s wrath upon the
tribe of ‘Usaiya, and he used to say, “The people of ‘Usaiya have disobeyed Allah and His Apostle.”