It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "When you meet a pilgrim, greet him with salam, shake hands with him, and ask him to pray for your forgiveness before he enters his home, for he is forgiven."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5371
Hadith Gradingحکم دارالسلام:إسناده ضعيف جدا، محمد بن الحارث الحارثي وعبدالرحمن بن البيلماني أبو محمد ضعيفان ، ومحمد بن عبدالرحمن البيلماني ضعيف أيضا ، وقال عنه البخاري : منكر الحديث .