Ishaq ibn Ibrahim and Muhammad ibn Rafi' narrated to us—Ibn Rafi' said: 'Abd al-Razzaq narrated to us, Ibn Jurayj informed us, Abu al-Zubayr informed me that he heard Jabir ibn 'Abd Allah say: The Messenger of Allah, peace and blessings be upon him, said: "When one of you performs istijmar (cleaning with stones), let him do it an odd number of times."