Hadithcore
Sahih Muslim, 572 c
sahih

This hadith is reported by Mansur with the same chain of transmitters, but with these words:

" He should aim at correct (prayer) and it is advisable."

وَحَدَّثَنَاهُ عَبْدُ اللَّهِ بْنُ عَبْدِ الرَّحْمَنِ الدَّارِمِيُّ، أَخْبَرَنَا يَحْيَى بْنُ حَسَّانَ، حَدَّثَنَا وُهَيْبُ بْنُ خَالِدٍ، حَدَّثَنَا مَنْصُورٌ، بِهَذَا الإِسْنَادِ وَقَالَ مَنْصُورٌ ‏

‏ فَلْيَنْظُرْ أَحْرَى ذَلِكَ لِلصَّوَابِ ‏

‏ ‏.‏

References2 variants
In-Book Reference
Book 5, Hadith 114
USC-MSA web (English) reference
Book 4, Hadith 1170 (deprecated numbering scheme)