English translation
1721. It was reported from Az- Zuhri, from AbU Sinãn, from Ibn 'Abbãs, that Al-Aqra' bin Uãbis asked the Prophet : "0 Messenger of Allah! Is IIajj (obligatory) every year, or only once?" He replied: "Rather, only once, and whoever does more it will be (counted as) voluntary (worship)." (Sahih) AbU Dãwud said: He is AbU Sinãn Ad-Duw'ali, this is who 'Abdul-Jalil bin Humaid and Sulaimãn bin Kathir both said it from Az-Zuhri, while 'Uqail said: "From Sinãn."
