question #1 Sahih al-Bukhari 1290, Book 23, Hadith 48 : What is the Islamic perspective on mourning and expressing grief for the deceased?

That his father said, “When `Umar was stabbed, Suhaib started crying: O my brother! `Umar said,
‘Don’t you know that the Prophet (ﷺ) said: The deceased is tortured for the weeping of the living’?”