Musannaf Ibn Abi Shaybah 31292 — What is said when seeking a need

Waki' said that Malik bin Mighwal stated: I looked for al-Hakam regarding some need but could not find him. Then I began looking for him again and found him. And al-Hakam said: Khaythamah stated: When one of you asks for his need and then his need is fulfilled, he should also ask Allah, the Lord of Honour, for Paradise. Perhaps that will be a day on which his every supplication is accepted.