Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Prophet (peace and blessings be upon him) delivered a sermon with his back toward the Multazam.
Ahmad recorded it; its chain contains Abdullah bin al-Mu'ammal, who is thiqah (trustworthy), though he has been criticised. Hadiths on this subject will come later in the chapter on Hajj, if Allah wills.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 3111