Sahih Muslim , Book 33, Hadith 265 (In-Book) ⓘ
This tradition has been reported through anothee chain. 'Abdurahman, one of the sub-narrators, said "I do not know if it in the hadith or not", meaning (the words) "doubting their fidelity and spying into their lapses."
وَحَدَّثَنِيهِ مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا عَبْدُ الرَّحْمَنِ، حَدَّثَنَا سُفْيَانُ، بِهَذَا الإِسْنَادِ قَالَ عَبْدُ الرَّحْمَنِ قَالَ سُفْيَانُ لاَ أَدْرِي هَذَا فِي الْحَدِيثِ أَمْ لاَ . يَعْنِي أَنْ يَتَخَوَّنَهُمْ أَوْ يَلْتَمِسَ عَثَرَاتِهِمْ .
also referenced under: Hadith 715 (Reference) & Book 20, Hadith 4730 (USC-MSA)