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 house, for he is forgiven.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 6112
Hadith Gradingحکم دارالسلام:إسناده ضعيف جدا ، محمد بن الحارث الحارثي وعبدالرحمن بن البيلماني ضعيفان، ومحمد بن عبدالرحمن البيلماني ضعيف أيضا، وقال عنه البخاري: منكر .