that 'Amr bin 'Abdullah bin Safwan informed him, that Kaladah bin Hanbal had informed him, that Safwan bin Umayyah sent him to bring some milk, colostrum, and Daghabis (a type of herb) to the Prophet ﷺ while he was in the upper valley. (He said): "I entered upon him without seeking permission nor giving Salam. The Prophet ﷺ said: 'Go back and say: As-Salamu Alaykum, may I enter?'" And that was after Safwan had accepted Islam." (Using translation from Tirmidhī 2710)   

أَخْبَرَهُ أَنَّ صَفْوَانَ بْنَ أُمَيَّةَ بَعَثَهُ فِي الْفَتْحِ بِلِبَإٍ وَجَدَايَةٍ وَضَغَابِيسَ وَالنَّبِيُّ ﷺ بِأَعْلَى الْوَادِي قَالَ فَدَخَلْتُعَلَيْهِ وَلَمْ أُسَلِّمْ وَلَمْ أَسْتَأْذِنْ فَقَالَ النَّبِيُّ ﷺ ارْجِعْ فَقُلِ السَّلَامُ عَلَيْكُمْ أَدْخُلُ؟ بَعْدَ مَا أَسْلَمَ صَفْوَانُ قَالَ عَمْرٌو أَخْبَرَنِي هَذَا الْخَبَرَ أُمَيَّةُ بْنُ صَفْوَانَ وَلَمْ يَقُلْ سَمِعْتُهُ مِنْ كَلَدَةَ قَالَ الضَّحَّاكُ وَابْنُ الْحَارِثِ وَذَلِكَ بَعْدَمَا أَسْلَمَ وَقَالَ الضَّحَّاكُ وَعَبْدُ اللهِ بْنُ الْحَارِثِ بِلَبَنٍ وَجَدَايَةٍ