Visiting a sick disbeliever
Anas (radi Allahu anhu) reported: A young Jewish boy who was in the service of the Prophet (sal Allahu alaihi wa sallam) fell ill. The Prophet (sal Allahu alaihi wa sallam) went to visit him. He sat down by his head and said to him, “Embrace Islam.” The little boy looked at his father who was sitting beside him. He said: “Obey Abul-Qasim (i.e., the Messenger of Allah (sal Allahu alaihi wa sallam)).” So he embraced Islam and the Prophet stepped out saying, “Praise be to Allah Who has saved him from Hell-fire.”
Herein, the example of the Messenger of Allah (sal Allahu alaihi wa sallam) inspires us to visit even a sick disbeliever and invite him to accept Islam.
Besides, the Hadith tells that the company of the virtuous does bear fruit and that we should continue to hope that the heart of a disbeliever will turn to Allah at any moment.
Furthermore, we come to believe that parents, though not clinging to the right way, may tell their offspring to pursue the truth.
And Allah knows best!