(71) باب مَنْ يَدْخُلُ قَبْرَ الْمَرْأَةِ
Narrated Anas:
We were in the funeral procession of the daughter of Allah's Messenger (ﷺ) and Allah's Messenger (ﷺ) was sitting near the grave and I saw his eyes full of tears. He said, "Is there anyone amongst you who did not have sexual relations with his wife last night?" Abu Talha replied in the affirmative. And so Allah's Apostle told him to get down in her grave and he got down in her grave and buried her.
Reference: Sahih al-Bukhari 1342
In-book reference: Book 23, Hadith 98
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 23, Hadith 426