Usama ibn Sharik said, "I was with the Prophet (ﷺ) when some bedouins came. There were many people on all sides. The people were silent and no one spoke except them. They said, 'Messenger of Allah! We experience difficulty in such-and-such and such-and-such' and it was in things which are not harmful to people. He said, 'Servants of Allah! Allah has removed difficulty except in a case where a man slanders someone unjustly - that is the one who is in difficulty and destroyed.' They said, 'Messenger of Allah, can we make use of medical treatment?' 'Yes, servants of Allah,' he replied, 'you can make use of medical treatment. Allah Almighty did not create an illness but that He made a cure for it - except for one disease.' They asked, 'And what is that, Messenger of Allah?' 'Old age,' he replied. They said, 'Messenger of Allah, what is the best thing that a man can be given?' 'Good character,' he replied.'"