Habib bin Abi Thabit narrates: I used to go out with my father; we would meet the pilgrims and greet them with salam before they became soiled (by getting caught up in everyday affairs).
Ahmad recorded it; its chain contains a narrator, Isma'il bin Abd al-Malik, who is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الحج / 5928