Sunan Abi Dawud 1537
سنن أبي داود#1537Sahihحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا مُعَاذُ بْنُ هِشَامٍ، حَدَّثَنِي أَبِي، عَنْ قَتَادَةَ، عَنْ أَبِي بُرْدَةَ بْنِ عَبْدِ اللَّهِ، أَنَّ أَبَاهُ، حَدَّثَهُ أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ إِذَا خَافَ قَوْمًا قَالَ " اللَّهُمَّ إِنَّا نَجْعَلُكَ فِي نُحُورِهِمْ وَنَعُوذُ بِكَ مِنْ شُرُورِهِمْ " .
Narrated AbuMusa al-Ash'ari: When the Prophet (ﷺ) feared a (group of) people, he would say: "O Allah, we make Thee our shield against them, and take refuge in Thee from their evils
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 8:122