Sunan an-Nasa'i 4355
سنن النسائي#4355Sahihأَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا ابْنُ أَبِي فُدَيْكٍ، عَنِ ابْنِ أَبِي ذِئْبٍ، عَنْ سَعِيدِ بْنِ خَالِدٍ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ عُثْمَانَ، أَنَّ طَبِيبًا، ذَكَرَ ضِفْدَعًا فِي دَوَاءٍ عِنْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم فَنَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم عَنْ قَتْلِهِ .
It was narrated from 'Abdur-Rahman bin 'Uthman that:a physician made mention of the use of frogs in a remedy in the presence of the Messenger of Allah and the Messengher of Allah forbade killing them. (sahih)
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: 42:93