Abu Ubaidah ibn al-Jarrah

Definition and stakes

Aḥmad ibn Yaḥyá al-Balādhurī The Origins of the Islamic State (1916)

By such means, they enriched themselves. Hence, the saying, "It is good to be in authority even over stones." [9] This saying, however, is, according to al-Athram, explained by abu-ʿUbaidah by the fact that al-Ḥajjâj ibn-ʿAtîk ath-Thaḳafi, or his son, had charge of cutting the pillars for the al-Baṣrah mosque from Jabal al-Ahwâz where he discovered a mine. This gave rise to the expression: "It is good to be in authority even over stones."
Abu-ʿUbaidah states that the colonization of al-Kûfah took place in the year 18.
Source: Wikisource

Thomas Patrick Hughes A Dictionary of Islam — 'Umar (1885)

Avho succeeded Abu Bakr, a.h. 13 (a.d. (J34) , and was assassinated by Firoz, a Persian slave, a.h. 23 (a.d. 644) , after a prosperous reign of ten years. His conversion to Islam took place in the sixth year of Muhammad's mission, and the Prophet took 'Umar's daughter Hafsah as his third wife.
'Umar is eminent amongst the early Khalifahs for having chiefly contributed to the spread of Islam. Under him the great generals, Abu 'Ubaidah, Khalid ibn al-Walid, Yazid, drove the Greeks out of Syria and Phoenicia
Source: Wikisource

Griffithes Wheeler Thatcher 1911 Encyclopædia Britannica, Volume 1… (1911)

ABŪ UBAIDA [Maʽmar ibn ul-Muthanna] (728–825) , Arabian scholar, was born a slave of Jewish Persian parents in Baṣra, and in his youth was a pupil of AbūʽAmr ibn ul-ʽAlā. In 803 he was called to Bagdad by Harūn al-Rashīd. He died in Baṣra. He was one of the most learned and authoritative scholars of his time in all matters pertaining to the Arabic language, antiquities and stories, and is constantly cited by later authors and compilers. Jāhiz held him to be the most learned scholar in all branches of human knowledge, and Ibn Hishām accepted his interpretation even of passages in the Koran.
Source: Wikisource

Get perspective with Kwize: daily news enlightened by great literature