Sahih Muslim , Book 4, Hadith 1174 (USC-MSA) ⓘ
This hadith has been narrated by Mansur and he said: " He should aim at correctness."
وَحَدَّثَنَاهُ ابْنُ أَبِي عُمَرَ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ عَبْدِ الصَّمَدِ، عَنْ مَنْصُورٍ، بِإِسْنَادِ هَؤُلاَءِ وَقَالَ " فَلْيَتَحَرَّ الصَّوَابَ " .
also referenced under: Book 5, Hadith 118 (In-Book) & Hadith 572 (Reference)