Musnad Ahmad 30:3131

Surayj narrated to us, he said: Fulayh narrated to us, from al-Harith ibn Fudayl al-Ansari, from Ziyad ibn Sa'd, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The son of Maryam will descend as a just leader and a fair judge. He will break the cross, kill the swine, restore peace, and turn swords into sickles. The venom of every venomous creature will be removed, the sky will send down its provision, and the earth will bring forth its blessing, until a young boy plays with a snake and it does not harm him, the wolf grazes with the sheep and does not harm them, and the lion grazes with the cattle and does not harm them."