How authentic is the Hadith: "Indeed, whoever places camels for sustenance, without ostentation, then even their dung and urine in the ground will glorify Allah for him"?

It appears the questioner confused camels with horses in the Hadith. It is narrated in Sahih Muslim on the authority of Abu Hurairah that the Prophet, peace and blessings be upon him, mentioned the punishment for withholding zakat on gold, silver, camels, cattle, and sheep: that they would torment their owner on the Day of Resurrection, a day the measure of which is fifty thousand years. As for horses, he mentioned that they are of three types: a burden for a man who ties them for show and pride; a shield for a man who ties them in the way of Allah and does not forget Allah's right concerning them; and a reward for a man who ties them in the way of Allah for the people of Islam, so whatever they eat, defecate, urinate, or drink, good deeds are written for him. As for donkeys, nothing was revealed concerning them except the verse: "So whoever does an atom's weight of good will see it, and whoever does an atom's weight of evil will see it."