It is narrated from Sayyiduna Maslamah bin Mukhallad (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) supplicated for Sayyiduna Mu'awiyah (may Allah be pleased with him): "O Allah, grant him knowledge of the Book and of reckoning, and grant him authority in the land."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17115