Hadith 17:409
Abu Khalid al-Ahmar narrated to us, from Ibn ‘Ajlan, from Nafi’, who said: I was traveling with ‘Abdullah ibn Abi Zakariyya in the land of the Byzantines. My mount urinated, so it stopped and urinated. Then I caught up with him, and he said, "Did you not offer the greeting of peace (salam)?" I said, "I only just parted from you." He said, "Even if you parted from me? The companions of the Messenger of Allah (may Allah bless him and grant him peace) used to travel together, and a tree would come between them, so they would meet and some of them would offer the greeting of peace to others."
حدثنا أبو خالد الأحمر عن بن عجلان عن نافع قال كنت أسير مع عبد الله بن أبي زكريا في أرض الروم فبالت دابتي فقامت فبالت فلحقته فقال ألا سلمت فقلت إنما فارقتك الآن قال وإن فارقتني كان أصحاب رسول الله صلى الله عليه وسلم يتسايرون فتفرق بينهم الشجرة فيلتقون فيسلم بعضهم على بعض