Salim bin 'Abdullah bin 'Umar سالم بن عبد الله بن عمر بن الخطاب · The Book on Jana''iz (Funerals)

"A man died among the Ansar named Qarazah bin Ka'b, and he was being wailed over. So Al-Mughirah bin Shu'bah came and ascended the Minbar. He uttered thanks and praise to Allah and said: "As for the gravity of wailing in Islam, indeed I heard the Messenger of Allah saying: 'The one who is wailed over is punished as long as he is being wailed over.'"

"The Prophet took Abdur-Rahman bin Awf by the hand and went with him to his son Ibrahim. He found him in his last breaths, so he took him and put him on his lap and cried. Abdur-Rahman said to him: 'You cry? Didn't you prohibit (your followers) from crying?' He said: 'No. But I prohibited two foolish immoral voices: A voice during a calamity while clawing at one's face and tearing one's clothes, and Shaitan's scream.'" And there is more…

Amrah informed him that she heard Aishah, while it was being mentioned to her that Ibn Umar had said that the deceased would be punished for the crying of the living (over him). So Aishah said: 'May Allah forgive Abu Abdur-Rahman. He has not lied, but he is mistaken in the understanding. Rather, the Messenger of Allah passed by a Jewish woman who was being cried over, so he said: 'They are crying over her and she is being punished…

The Messenger of Allah said: "Whoever performs the funeral prayer then he will get a reward equal to a Qirat. Whoever follows it until it is buried then he will get a reward equal to two Qirat, one of them, or the least of them, is similar to Uhud (mountain)." This was mentioned to Ibn Umar, so he sent a message to Aishah to ask her about that, and she said: "Abu Hurairah has told the truth." So Ibn Umar…