Is the hadith of Abu Umamah authentic — the one in which the Prophet ﷺ taught him a form of glorification that surpasses remembering Allah during the night and day?

This Hadith was narrated by Abu Umamah Al-Bahili, attributed to the Prophet, peace and blessings be upon him. It has multiple chains of narration from him. Sheikh Al-Albani and Al-Hafiz Ibn Hajar authenticated it, and Al-Haythami said: "Its narrators are the narrators of the Sahih."

This Hadith highlights the virtue of this specific remembrance (Dhikr). The Prophet, peace and blessings be upon him, informed that whoever recites it will attain a great reward, surpassing most other remembrances. This is because preferring "Subhan Allah wa bihamdihi, adada khalqihi, wa rida nafsihi, wa zinata arshihi, wa midada kalimatih" (Glory be to Allah and with His praise, as many times as the number of His creations, as much as pleases Him, as much as the weight of His Throne, and as much as the ink of His words) over merely "Subhan Allah" (Glory be to Allah) is manifold, due to the knowledge, glorification, and magnification that fills the heart of the one who recites it. This is called multiplied remembrance, and it is a greater praise than singular remembrance.