I prayed behind the Messenger of Allah (ﷺ) and he prayed for a woman who had died in the state of delivery. He stood in front of her waist.
Sahih Muslim Book 11, Hadith 112
← Previous Hadith I heard the Prophet (ﷺ) say (while offering prayer on a dead body): O Allah! forgive him, have mercy upon him. Give him peace and absolve him. Receive him with honour and make his grave spacious. Wash him with water, snow and hail, cleanse him from faults as is cleaned a white garment from impurity. Requite him with an abode more excellent than his abode, with a family better than his family, and with a mate better than his mate, and save him from the trial of the grave and torment of Hell. 'Auf b. Malik said: I earnestly desired that I were the dead person to receive the prayer of the Messenger of Allah (ﷺ) as this dead body had (received).

Sahih Muslim Book 11, Hadith 111 Next Hadith → This hadith has been narrated by Husain with the same chain of transmitters, but no mention is made of Umm Ka'b.

Sahih Muslim Book 11, Hadith 113