In one narration the words are: Sayyiduna Abdullah bin Amr (may Allah be pleased with him) says: "Sayyiduna Jibril (peace be upon him) came down from Paradise with this stone, so benefit from it, for you will continue to remain upon goodness as long as it remains among you. Soon a time will come when it will go back to where it came from." Imam al-Tabarani recorded all these narrations in al-Mu'jam al-Kabir, and their narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الحج / 5485