Hadith 4:98
Ma'qil b. Yasar reported God’s messenger as saying, “Recite sura. Ya Sin(Qur’an, xxxvi) over your dead.”(This is a literal translation. The meaning is probably those who are on the point of death.) Ahmad, Abu Dawud and Ibn Majah transmitted it.
وَعَنْ مَعْقِلِ بْنِ يَسَارٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم: «اقرؤوا سُورَةَ (يس) عَلَى مَوْتَاكُمْ» . رَوَاهُ أَحْمَدُ وَأَبُو دَاوُد وَابْن مَاجَه
Original Reference: Mishkat al-Masabih 1622