This hadith has been narrated by another chain of transmitters and in the one narrated by Ibn Mubarak and Ibn Abu Za'ida (these words are narrated). Ibn 'Umar then recited:" Whether you turn thither is Allah's face," and it was revealed in this context.
وَحَدَّثَنَاهُ أَبُو كُرَيْبٍ، أَخْبَرَنَا ابْنُ الْمُبَارَكِ، وَابْنُ أَبِي زَائِدَةَ، ح وَحَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا أَبِي كُلُّهُمْ، عَنْ عَبْدِ الْمَلِكِ، بِهَذَا الإِسْنَادِ نَحْوَهُ . وَفِي حَدِيثِ ابْنِ مُبَارَكٍ وَابْنِ أَبِي زَائِدَةَ ثُمَّ تَلاَ ابْنُ عُمَرَ{ فَأَيْنَمَا تُوَلُّوا فَثَمَّ وَجْهُ اللَّهِ}وَقَالَ فِي هَذَا نَزَلَتْ .
Muslim
The Book of Prayer - Travellers • Hadith 44