Narrated Abu Sa`id:

Once a bedouin came to the Prophet (ﷺ) and asked him about the migration. The Prophet (ﷺ) said, "Mercy of Allah be on you! The migration is a quite difficult matter. Have you got some camels?" He replied in the affirmative. Then the Prophet (ﷺ) said, "Do you give their Zakat?" He replied in the affirmative. The Prophet (ﷺ) said, "Do you let others benefit by their milk gratis?" He replied in the affirmative. Then the Prophet (ﷺ) asked, "Do you milk them on their watering days and give their milk to the poor and needy?" He replied in the affirmative. The Prophet, said, "Go on doing like this from beyond the seas, and there is no doubt that Allah will not overlook any of your good deeds."

حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا الْوَلِيدُ بْنُ مُسْلِمٍ، حَدَّثَنَا الأَوْزَاعِيُّ،‏.‏ وَقَالَ مُحَمَّدُ بْنُ يُوسُفَ حَدَّثَنَا الأَوْزَاعِيُّ، حَدَّثَنَا الزُّهْرِيُّ، قَالَ حَدَّثَنِي عَطَاءُ بْنُ يَزِيدَ اللَّيْثِيُّ، قَالَ حَدَّثَنِي أَبُو سَعِيدٍ ـ رضى الله عنه ـ قَالَ جَاءَ أَعْرَابِيٌّ إِلَى النَّبِيِّ صلى الله عليه وسلم فَسَأَلَهُ عَنِ الْهِجْرَةِ فَقَالَ ‏"‏ وَيْحَكَ إِنَّ الْهِجْرَةَ شَأْنُهَا شَدِيدٌ، فَهَلْ لَكَ مِنْ إِبِلٍ ‏"‏‏.‏ قَالَ نَعَمْ‏.‏ قَالَ ‏"‏ فَتُعْطِي صَدَقَتَهَا ‏"‏‏.‏ قَالَ نَعَمْ‏.‏ قَالَ ‏"‏ فَهَلْ تَمْنَحُ مِنْهَا ‏"‏‏.‏ قَالَ نَعَمْ‏.‏ قَالَ ‏"‏ فَتَحْلُبُهَا يَوْمَ وُرُودِهَا ‏"‏‏.‏ قَالَ نَعَمْ‏.‏ قَالَ ‏"‏ فَاعْمَلْ مِنْ وَرَاءِ الْبِحَارِ، فَإِنَّ اللَّهَ لَنْ يَتِرَكَ مِنْ عَمَلِكَ شَيْئًا ‏"‏‏.‏