Al-Mu'jam al-Awsat 9249 — he heard the Messenger of Allah ﷺ saying

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that he heard the Messenger of Allah (peace and blessings be upon him) saying: "One of the servants of Allah said: 'Ay rabbi, laka al-hamdu kama yanbaghi li-jalali wajhika wa li-'azimi sultanik' (O my Lord, to You belongs all praise, as befits the majesty of Your Face and the greatness of Your dominion). These words perplexed the two angels (as to how to record their reward), so they ascended to the lowest heaven and said: 'O our Lord, Your servant has said words that we do not know how to record.'"
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) only with this chain, and Sadaqah bin Bashir is alone in narrating it."