Authentic Supplication Number 133.
And she said: The Messenger of Allah entered upon Abi Salamata and his eyes were staring fixedly. So he closed them, then he said: “When the soul is grabbed the sight follows it,” some of his family clamored. He then said: “Do not invoke upon yourselves anything but good, because the Angels are saying ‘Aameen’ [O’ Allah answer] to what you are saying.” He then said: Allahumma ‘ighfir li ‘Abi Salamata, warfa` darajatahu fil mahdiyyeena, wakhlufhu fee `aqibihi fil ghabireena, waghfir lana wa lahu ya rabbal `alameena, wafsah lahu fee qabrihi, wa nawwir lahu feehi (155).
(155) O’ my ‘ilah I ask Your forgiveness for Abi Salamata, that You raise his rank among those who are guided, grant him succession in his descendants who remain, forgive us and him O’ Lord of the Worlds; grant him spaciousness in his grave, and make light in it for him.
Reported by Muslim, and is #115 in The Authentic of Good Sayings.