Sayyiduna Jabir (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said concerning grazing horses: "On every horse there is one dinar."
Ghurak alone narrated it. Ali bin Umar al-Hafiz (al-Daraqutni) said: Ghurak alone narrated it from Ja'far; he is very weak, and those below him in the chain are weak.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7419