What is said in supplication for the deceased after burial

Abdullah bin Abi Bakr said: When earth had been poured over the grave of a deceased person and it had been levelled, Sayyiduna Anas (may Allah be pleased with him) would stand over the grave and supplicate like this: "O Allah, Your servant has been returned to You, so be kind to him and have mercy on him. O Allah, make the earth spacious at his sides, open the gates of heaven for his soul, and accept him from Yourself with a goodly acceptance. O Allah, if he was a doer of good, then double his good deeds; and if he was a wrongdoer, then overlook his wrongs."

Umayr bin Sa'id said: Sayyiduna Ali (may Allah be pleased with him) said four takbirs at the funeral of Yazid bin al-Mukaffaf. Then he stood at his grave and supplicated like this: "O Allah, this is Your servant and the son of Your servant. Today he has become Your guest, and You are the best of hosts. O Allah, make his grave spacious and forgive his sin. We know nothing but good, and You know better about this."

Abdullah bin Abi Mulaykah said: When they had finished levelling the grave of Sayyiduna Abdullah bin al-Sa'ib (may Allah be pleased with him), Sayyiduna Ibn Abbas (may Allah be pleased with them both) stood at his grave. He remained standing over it, then he supplicated and went back.

Ibn Ulayyah said: I saw Ayyub standing at a grave, and he supplicated for the deceased. And many times I saw him supplicating for the deceased while the one burying him was still in the grave, before he came out.