What has been said about (facing) the Qiblah (Kabah at Makkah) and wherever considered that there was no need to repeat the Salat (prayer) if someone offered prayers by mistake facing a direction other than that of the Qiblah
حَدَّثَنَا ابْنُ أَبِي مَرْيَمَ، قَالَ أَخْبَرَنَا يَحْيَى بْنُ أَيُّوبَ، قَالَ حَدَّثَنِي حُمَيْدٌ، قَالَ سَمِعْتُ أَنَسًا، بِهَذَا.
Narrated Anas: as above (395).