The same hadith has been narrated by a different chain of transmitters with a slight variation in wording:

'Umar b. al-Khattab sent for me and said: Some families from your tribe have come to me (then follows the foregoing hadith) by Malik with the difference that the Messenger of Allah (ﷺ) would spend on his family for a year. And sometimes Ma'mar said: He would retain sustenance for his family for a year, and what was left of that he spent in the cause of Allah, the Majestic and Exalted.

حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، وَمُحَمَّدُ بْنُ رَافِعٍ، وَعَبْدُ بْنُ حُمَيْدٍ، - قَالَ ابْنُ رَافِعٍ حَدَّثَنَا وَقَالَ الآخَرَانِ، أَخْبَرَنَا عَبْدُ الرَّزَّاقِ، - أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنْ مَالِكِ بْنِ أَوْسِ، بْنِ الْحَدَثَانِ قَالَ أَرْسَلَ إِلَىَّ عُمَرُ بْنُ الْخَطَّابِ فَقَالَ إِنَّهُ قَدْ حَضَرَ أَهْلُ أَبْيَاتٍ مِنْ قَوْمِكَ ‏.‏ بِنَحْوِ حَدِيثِ مَالِكٍ ‏.‏ غَيْرَ أَنَّ فِيهِ، فَكَانَ يُنْفِقُ عَلَى أَهْلِهِ مِنْهُ سَنَةً وَرُبَّمَا قَالَ مَعْمَرٌ يَحْبِسُ قُوتَ أَهْلِهِ مِنْهُ سَنَةً ثُمَّ يَجْعَلُ مَا بَقِيَ مِنْهُ مَجْعَلَ مَالِ اللَّهِ عَزَّ وَجَلَّ ‏.‏