Question: which nabvi is called year of sorrow?
Answer: In the Islamic tradition, the Year of Sorrow (Arabic: عام الحزن‎, romanized: 'Ām al-Ḥuzn, also translated Year of Sadness) is the Hijri year in which Muhammad's wife Khadijah and his uncle and protector Abu Talib died. The year approximately coincided with 619 CE or the tenth year after Muhammad's first revelation.