ENOfficial
'Amr reported on the authority of Jabir that in the expedition of Khabat (leaves) a person slaughtered three camels, then three, then three, then Abu 'Ubaida forbade him (to do so fearing that the rides may become short).
Source: sunnah.com
Other translations
Arabic
وَحَدَّثَنَا عَبْدُ الْجَبَّارِ بْنُ الْعَلاَءِ، حَدَّثَنَا سُفْيَانُ، قَالَ سَمِعَ عَمْرٌو، جَابِرًا يَقُولُ فِي جَيْشِ الْخَبَطِ إِنَّ رَجُلاً نَحَرَ ثَلاَثَ جَزَائِرَ ثُمَّ ثَلاَثًا ثُمَّ ثَلاَثًا ثُمَّ نَهَاهُ أَبُو عُبَيْدَةَ .
sunnah.com