Mishkat al-Masabih 4 Prayer كتاب الصلاة 373

وَعَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ قَالَ: إِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يُسَلِّمُ عَنْ يَمِينِهِ: «السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ» حَتَّى يُرَى بَيَاضُ خَدِّهِ الْأَيْمَنِ وَعَنْ يَسَارِهِ: «السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ» حَتَّى يُرَى بَيَاضُ خَدِّهِ الْأَيْسَرِ. رَوَاهُ أَبُو دَاوُدَ وَالنَّسَائِيّ وَالتِّرْمِذِيّ وَلَمْ يَذْكُرِ التِّرْمِذِيُّ حَتَّى يُرَى بَيَاضُ خَدِّهِ

Mu’adh b. Jabal said that God’s Messenger took him by the hand and said, “I love you, Mu’adh,” to which he replied, “And I love you, Messenger of God.” He then told him not to omit to say at the end of every prayer, “My Lord, help me to remember Thee, thank Thee, and worship Thee acceptably.” Ahmad, Abu Dawud and Nasa’i transmitted it, but Abu Dawud did not mention that Mu‘adh said, “And I love you.”