Sahih Muslim , Book 4, Hadith 1173 (USC-MSA) ⓘ
This hadith has been reported by Mansur with the same chain of transwitters and he said: " He should aim at what is according to him correct."
وَحَدَّثَنَاهُ يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا فُضَيْلُ بْنُ عِيَاضٍ، عَنْ مَنْصُورٍ، بِهَذَا الإِسْنَادِ وَقَالَ " فَلْيَتَحَرَّ الَّذِي يُرَى أَنَّهُ الصَّوَابُ " .
also referenced under: Book 5, Hadith 117 (In-Book) & Hadith 572 (Reference)