Sayyiduna Rabi'ah bin Amir bin Bijad (may Allah be pleased with him) said: I heard the Prophet (peace and blessings be upon him) say: "Persist in saying: 'Ya Dhal-Jalali wal-Ikram (O Possessor of Majesty and Honour).'"
Hadith Referenceالمعجم الكبير للطبراني / باب الراء / 4579