Sahih Muslim 572 e
This hadith has been narrated by Mansur with the same chain of transmitters and said:
" He should aim at correctness and that is right."
حَدَّثَنَاهُ مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ مَنْصُورٍ، بِهَذَا الإِسْنَادِ وَقَالَ ‏
"‏ فَلْيَتَحَرَّ أَقْرَبَ ذَلِكَ إِلَى الصَّوَابِ ‏"‏ ‏.‏