1560. Commentary: ➊ The measure of a wasq has been known and established as sixty sa’ (sa’) since the best generations (khayr al-quroon). ➋ Hajjaji: This is an attribution to Amir Hajjaj ibn Yusuf, indicating that it bore the official seal from the government.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 1560