Next, take every care to steer him toward doing righteous deeds and speaking good words during his illness. Say to him, for example, “Allah may decree sickness for a person and make it a source of good: it frees his time for remembrance, for reciting the Qur’an, and the like.” Perhaps he will take heed, and you will earn the reward of having guided him.

895 – Abu Hurayrah (may Allah be pleased with him) reported that the Messenger of Allah, peace and blessings be upon him, said, “The rights of one Muslim over another are five: returning the greeting of peace, visiting the sick, following funeral processions, accepting invitations, and responding to the one who sneezes.” Agreed upon.

[Explanation]
The author, al-Nawawi (may Allah have mercy on him), says in his Riyadh al-Salihin, “The Book of Visiting the Sick and Escorting Funerals.” Both ‘iyadah and ziyarah are used for visiting, yet ziyarah applies to the healthy—when you visit a brother for Allah’s sake in his house or wherever he is, that is called ziyarah—whereas ‘iyadah is specific to the sick, because a person keeps coming back and repeating the visit as long as