It is recommended to say qunut in all prayers if a calamity befalls the Muslims – and refuge is sought from Allah (regarding that). It is recommended to say qunut in Subh at all times. And the clarification that it is to be said after raising the head from bowing in the final rak`ah, and it is recommended to say it out loud
حَدَّثَنِي أَبُو الطَّاهِرِ، أَحْمَدُ بْنُ عَمْرِو بْنِ سَرْحٍ الْمِصْرِيُّ قَالَ حَدَّثَنَا ابْنُ وَهْبٍ، عَنِ اللَّيْثِ، عَنْ عِمْرَانَ بْنِ أَبِي أَنَسٍ، عَنْ حَنْظَلَةَ بْنِ عَلِيٍّ، عَنْ خُفَافِ بْنِ إِيمَاءٍ الْغِفَارِيِّ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي صَلاَةٍ " اللَّهُمَّ الْعَنْ بَنِي لِحْيَانَ وَرِعْلاً وَذَكْوَانَ وَعُصَيَّةَ عَصَوُا اللَّهَ وَرَسُولَهُ غِفَارُ غَفَرَ اللَّهُ لَهَا وَأَسْلَمُ سَالَمَهَا اللَّهُ " .
Khufaf b. Ima' al-Ghifari reported that the Messenger of Allah (ﷺ) aid in prayer: 0 Allah I curse the tribes of Lihyan, Ri'l, Dhakwan, and 'Usayya for they disobeyed Allah and His Messenger (ﷺ). Allah pardoned (the tribe of) Ghifar and Allah granted protection to (the tribe of) Aslam