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.
| USC-MSA web (English) reference | : Book 17, Hadith 47 |
| Arabic reference | : Book 17, Hadith 623 |