It was narrated that "Abdullah bin Ja"far said:

The Messenger of Allah (ﷺ) rode on his mule, and he seated me behind him. When the Messenger of Allah (ﷺ) relieved himself, what he liked best to conceal himself with was a small hill or a cluster of date palms. He entered a garden belonging to a man of the Ansar where he found a camel. When it saw the Prophet (ﷺ) it groaned with tears in its eyes. - The Messenger of Allah (ﷺ) dismounted and stroked behind its ears and on its back and it calmed down. He said: “Who is the owner of this camel?" A young man of the Ansar came and said: Me. He said: "Do you not fear Allah with regard to this animal that Allah has put in your possession? It is complaining to me that you keep it hungry and overburden it with work.” Then the Messenger of Allah (ﷺ) went into the garden and relieved himself, then he did wudoo’ and came, with the water dripping from his beard onto his chest, and he told me something secret that i shall never tell to anyone. We insisted that he tell us, but he said: I shall not disclose the secret of the Messenger of Allah (ﷺ) until I meet Allah.