ENOfficial
Jabir said they were forbidden game caught by a dog belonging to Magians. Tirmidhi transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَن جابرٍ قَالَ: نُهِينَا عَنْ صَيْدِ كَلْبِ الْمَجُوسِ. رَوَاهُ التِّرْمِذِيّ
sunnah.com
Mishkat al-Masabih
Book 20Hadith Number 4085