أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالَ حَدَّثَنَا بِشْرُ بْنُ الْمُفَضَّلِ، عَنْ يُونُسَ، عَنِ الْحَسَنِ، عَنْ صَعْصَعَةَ بْنِ مُعَاوِيَةَ، قَالَ لَقِيتُ أَبَا ذَرٍّ قَالَ قُلْتُ حَدِّثْنِي ‏.‏ قَالَ نَعَمْ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ مَا مِنْ عَبْدٍ مُسْلِمٍ يُنْفِقُ مِنْ كُلِّ مَالٍ لَهُ زَوْجَيْنِ فِي سَبِيلِ اللَّهِ إِلاَّ اسْتَقْبَلَتْهُ حَجَبَةُ الْجَنَّةِ كُلُّهُمْ يَدْعُوهُ إِلَى مَا عِنْدَهُ ‏"‏ ‏.‏ قُلْتُ وَكَيْفَ ذَلِكَ قَالَ ‏"‏ إِنْ كَانَتْ إِبِلاً فَبَعِيرَيْنِ وَإِنْ كَانَتْ بَقَرًا فَبَقَرَتَيْنِ ‏"‏ ‏.‏

It was narrated that Sa'sa'ah bin Mu'awiyah said: "I met Abu Dharr and said: 'Tell me a Hadith.' He said. Yes, the Messenger of Allah (PBUH) said: There is no Muslim worshiper who spends from each type of his wealth on a pair (of things) in the cause of Allah, but the keepers of Paradise will welcome him, all of them calling him to what they have (of reward).' I said: "How is that?" He said: "If it is camels, he gives two, and if it is cows, he gives two.'" Translation Not Available

Book Ref: Sunan An Nisai Book 25 Hadith 3185
Web Ref:  Sunan An Nisai Vol 1 Book 25 Hadith 3187