It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When any one of you intends to travel, let him greet his brothers with salam, for through their supplication they add further good to his own supplication."
Imam al-Tabarani (may Allah have mercy on him) said: "No one other than Yahya (may Allah have mercy on him) narrated this hadith from Suhayl (may Allah have mercy on him), and Amr (may Allah have mercy on him) is alone in narrating it from him."
Hadith Referenceالمعجم الأوسط / باب الألف / 2842
Hadith Gradingمحدثین:إسناده ضعيف لضعف يحيى بن العلاء البجلي
Hadith Takhrij«قال الهيثمي: وفيه يحيى بن العلاء البجلي وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 5، ص 256»» «أخرجه أبو يعلى فى «مسنده» برقم: 6686، وابن حجر فى «المطالب العالية» برقم: 3375»