It is narrated from Sayyiduna Ma'qil bin Yasar (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Recite Surah Ya-Sin over your dying (or those close to death)." Yahya bin Sa'id and others narrated it from Sulayman al-Taymi in mawquf form, but the view of Ibn al-Mubarak (that it is marfu') is the one relied upon, because an addition from a trustworthy narrator is accepted.