All in all a very weak hadith which is a complete antithesis to your earlier statement "There's an authentic hadith where the prophet asks his companions where the son sets, only to tell them it sets in a muddy spring of water. ".Sunan Abu Dawud book XVI
Abu Dharr said: I was sitting behind the Apostle of Allah who was riding a donkey while the sun was setting. He asked: Do you know where this sets? I replied: Allah and his Apostle know best. He said: It sets in a spring of warm water.