It is narrated from Sayyiduna al-Jarud Abu al-Mundhir (may Allah be pleased with him) that he asked the Messenger of Allah (peace and blessings be upon him) about stray animals, and he (peace and blessings be upon him) said: "The stray property of a Muslim is a burning of the Fire."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2096