حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عُمَرَ بْنَ الْخَطَّابِ، كَانَ إِذَا كَانَ فِي سَفَرٍ فِي رَمَضَانَ فَعَلِمَ أَنَّهُ دَاخِلٌ الْمَدِينَةَ مِنْ أَوَّلِ يَوْمِهِ دَخَلَ وَهُوَ صَائِمٌ ‏.‏ قَالَ يَحْيَى قَالَ مَالِكٌ مَنْ كَانَ فِي سَفَرٍ فَعَلِمَ أَنَّهُ دَاخِلٌ عَلَى أَهْلِهِ مِنْ أَوَّلِ يَوْمِهِ وَطَلَعَ لَهُ الْفَجْرُ قَبْلَ أَنْ يَدْخُلَ دَخَلَ وَهُوَ صَائِمٌ ‏.‏ قَالَ مَالِكٌ وَإِذَا أَرَادَ أَنْ يَخْرُجَ فِي رَمَضَانَ فَطَلَعَ لَهُ الْفَجْرُ وَهُوَ بِأَرْضِهِ قَبْلَ أَنْ يَخْرُجَ فَإِنَّهُ يَصُومُ ذَلِكَ الْيَوْمَ ‏.‏ قَالَ مَالِكٌ فِي الرَّجُلِ يَقْدَمُ مِنْ سَفَرِهِ وَهُوَ مُفْطِرٌ وَامْرَأَتُهُ مُفْطِرَةٌ حِينَ طَهُرَتْ مِنْ حَيْضِهَا فِي رَمَضَانَ أَنَّ لِزَوْجِهَا أَنْ يُصِيبَهَا إِنْ شَاءَ ‏.‏

27 Yahya related to me from Malik that he had heard that Umar ibnal-Khattab, if he was travelling in Ramadan and knew that he wouldreach Madina at the begining of the day ,would do so fasting. Yahya said that Malik said, "Someone who is travelling and knows thathe will be reaching his people in the first part of the day, and thendawn breaks before he gets there, should be fasting when he getsthere." Malik said, "Someone who intends to go away (on ajourney) in Ramadan, and then dawn breaks while he is still on hisland before he has left, should fast that day." Malik saidthat a man who returns from a journey in Ramadan and is not fastingmay have sexual intercourse with his wife if he wishes, if she is notfasting and she has just become pure after her menses. Translation Not Available

Book Ref: Muwatta Imam Malik Book 18 Hadith 661
Web Ref:  Muwatta Imam Malik Book 18 Hadith 27