The dead is punished in the grave because of wailing on it.
Sahih Muslim Book 11, Hadith 21
← Previous Hadith Be quiet, my daughter. Don't you know that the Messenger of Allah (ﷺ) had said:" The deceased is punished because of his family's weeping over the death"?

Sahih Muslim Book 11, Hadith 20 Next Hadith → The same hadith is narrated on the authority of 'Umar through another chain of transmitters.

Sahih Muslim Book 11, Hadith 22