Sahl ibn Hunayf reported: The Messenger of Allah, peace and blessings be upon him, said, “Whoever greets with peace, ten goods are recorded for him. Whoever greets with peace and the mercy of Allah, twenty good deeds are recorded for him. Whoever greets with peace, the mercy of Allah, and his blessings, thirty good deeds are recorded for him.”
Source: al-Mu’jam al-Kabīr 5563
Grade: Sahih li ghayrihi (authentic due to external evidence) according to Al-Albani
عَنْ سَهْلِ بْنِ حُنَيْفٍ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَنْ قَالَ السَّلَامُ عَلَيْكُمْ كُتِبَ لَهُ عَشْرُ حَسَنَاتٍ وَمَنْ قَالَ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ كُتِبَ لَهُ عِشْرُونَ حَسَنَةً وَمَنْ قَالَ السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ وَبَرَكَاتُهُ كُتِبَ لَهُ ثَلَاثُونَ حَسَنَةً
5563 المعجم الكبير للطبراني
2711 المحدث الألباني خلاصة حكم المحدث صحيح لغيره في صحيح الترغيب