Yahya related to me from Malik from Ibn Shihab that as-Sa'ib ibn Yazid said, "As a young man I used to work with Abdullah ibn Utba ibn Masud in the market of Madina in the time of Umar ibn al-Khattab and we used to take a tenth from the Nabateans."
Muwatta Malik Book 17, Hadith 51
← Previous Hadith Yahya related to me from Ibn Shihab from Salim ibn Abdullah from his father that Umar ibn al-Khattab used to take a twentieth from the cereals and olive oil of the Nabatean christians, intending by that to increase the cargo to Madina. He would take a tenth from pulses.

Muwatta Malik Book 17, Hadith 50 Next Hadith → Yahya related to me from Malik that he had asked Ibn Shihab why Umar ibn al Khattab used to take a tenth from the Nabateans, and Ibn Shihab replied, "It used to be taken from them in the jahiliyya, and Umar imposed it on them."

Muwatta Malik Book 17, Hadith 52