I heard the Messenger of Allah ﷺ say, "Cling persistently to the supplication, 'O Possessor of Majesty and Honor.'"
حدثنا إبراهيم بن إسحاق حدثنا عبد الله بن المبارك عن يحيى بن حسان من أهل بيت المقدس وكان شيخا كبيرا حسن الفهم
سمعت رسول الله ﷺ يقول ألظوا بيا ذا الجلال والإكرام
Its isnad is sahih. Yahya bin Hassan is Filastini, and he is trustworthy as previously noted. Ibn Mubarak here also confirms his trustworthiness and praises his understanding. The hadith was narrated by Tirmidhi 5/540, no. 3525, in "Supplications," chapter 92, and he said, "Gharib." Hakim graded it sahih in 1/498, and Dhahabi endorsed this. Haythami attributed it in 10/158 to Tabarani in Al-Kabir only, and said, "It contains Yahya bin Abdul-Hameed Hamani, who is daif," and he did not attribute it to Ahmad. But its isnad is in fact very sahih, as we can see.