Hadith of Supplication: The Prophet’s supplication he taught to Mu’adh because he loved him

Mu’adh ibn Jabal reported: The Messenger of Allah, peace and blessings be upon him, took me by the hand and he said, “O Mu’adh, I swear by Allah that I love you. I swear by Allah that I love you.” And he said, “I advise you, O Mu’adh, not to forget supplicating after every prayer, saying: O Allah, help me to remember you, give thanks to you, and worship you in the best manner.”
Source: Sunan Abu Dawud 1522
Grade: Sahih (authentic) according to An-Nawawi

عَنْ مُعَاذِ بْنِ جَبَلٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَخَذَ بِيَدِهِ وَقَالَ يَا مُعَاذُ وَاللَّهِ إِنِّي لَأُحِبُّكَ وَاللَّهِ إِنِّي لَأُحِبُّكَ فَقَالَ أُوصِيكَ يَا مُعَاذُ لَا تَدَعَنَّ فِي دُبُرِ كُلِّ صَلَاةٍ تَقُولُ اللَّهُمَّ أَعِنِّي عَلَى ذِكْرِكَ وَشُكْرِكَ وَحُسْنِ عِبَادَتِكَ

1522 سنن أبي داود كِتَاب الصَّلَاةِ بَاب تَفْرِيعِ أَبْوَابِ الْوِتْرِ – باب في الاستغفار

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