حَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَالَ مَا بَيْنَ الْمَشْرِقِ وَالْمَغْرِبِ قِبْلَةٌ إِذَا تُوُجِّهَ قِبَلَ الْبَيْتِ ‏.‏

Yahya related to me from Malik from Nafi that Umar ibn al-Khattabsaid, "Any direction that is between east and west can be taken as aqibla if the person praying is face-on to the House." Translation Not Available

Book Ref: Muwatta Imam Malik Book 14 Hadith 465
Web Ref:  Muwatta Imam Malik Book 14 Hadith 8