وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، أَنَّ عُمَرَ بْنَ أَبِي سَلَمَةَ، اسْتَأْذَنَ عُمَرَ بْنَ الْخَطَّابِ أَنْ يَعْتَمِرَ، فِي شَوَّالٍ فَأَذِنَ لَهُ فَاعْتَمَرَ ثُمَّ قَفَلَ إِلَى أَهْلِهِ وَلَمْ يَحُجَّ ‏.‏

Yahya related to me from Malik, from Ibn Shihab, from Said ibnal-Musayyab, that Umar ibn Abi Salama once asked Umar ibn alKhattabfor permission to do umra in Shawwal. He gave him permission, so hedid umra and then went back to his family, and he did not do hajj. Translation Not Available

Book Ref: Muwatta Imam Malik Book 20 Hadith 764
Web Ref:  Muwatta Imam Malik Book 20 Hadith 59