Yahya related to me from Malik from Ibn Shihab that as-Sa'ib ibnYazid said, "As a young man I used to work with Abdullah ibn Utba ibnMasud in the market of Madina in the time of Umar ibn al-Khattab andwe used to take a tenth from the Nabateans."
USC-MSA web (English) reference: Book 17, Hadith 48
Arabic reference: Book 17, Hadith 624