Jami` at-Tirmidhi, Volume 6, Book 45, Hadith 3389 (DarusSalam) ⓘ
Thawban (ra) said: “The Messenger of Allah said: ‘Whoever says when he reaches the evening: “I am pleased with Allah as (my) Lord, with Islam as (my) religion, and with Muhammad as (my) Prophet (Raḍītu billāhi rabban wabil-Islāmi dīnan wa bi-Muḥammadin nabiyyan) it is a duty upon Allah to please him.’” (Hasan Gharib)
حَدَّثَنَا أَبُو سَعِيدٍ الأَشَجُّ، حَدَّثَنَا عُقْبَةُ بْنُ خَالِدٍ، عَنْ أَبِي سَعْدٍ، سَعِيدِ بْنِ الْمَرْزُبَانِ عَنْ أَبِي سَلَمَةَ، عَنْ ثَوْبَانَ، رضى الله عنه قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ قَالَ حِينَ يُمْسِي رَضِيتُ بِاللَّهِ رَبًّا وَبِالإِسْلاَمِ دِينًا وَبِمُحَمَّدٍ نَبِيًّا كَانَ حَقًّا عَلَى اللَّهِ أَنْ يُرْضِيَهُ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ مِنْ هَذَا الْوَجْهِ .
also referenced under: Hadith 3389 (Reference) & Book 48, Hadith 20 (In-Book)