Hadith 42:69
'Uqba ibn 'Abdullah ibn 'Amr who said, "While we were sitting with the Prophet, may Allah bless him and grant him peace, in the shade of a tree while travelling between Makka and Madina, a bedouin, who was an example of the coarsest and fiercest kind of people came up and said, 'Peace be upon you,' and they said, 'And upon you.'"
حَدَّثَنَا يَحْيَى بْنُ سُلَيْمَانَ قَالَ: حَدَّثَنِي ابْنُ وَهْبٍ قَالَ: أَخْبَرَنِي حَيْوَةُ، عَنْ عُقْبَةَ بْنِ مُسْلِمٍ، عَنْ عَبْدِ اللهِ بْنِ عَمْرٍو قَالَ: بَيْنَمَا نَحْنُ جُلُوسٌ عِنْدَ النَّبِيِّ صلى الله عليه وسلم فِي ظِلِّ شَجَرَةٍ بَيْنَ مَكَّةَ وَالْمَدِينَةِ، إِذْ جَاءَ أَعْرَابِيٌّ مِنَ أَجْلَفِ النَّاسِ وَأَشَدِّهِمْ فَقَالَ: السَّلامُ عَلَيْكُمْ، فَقَالُوا: وَعَلَيْكُمُ
Original Reference: Al-Adab Al-Mufrad 1032