Who was slaughtered by a companion of Muhammad in 632?
Khalid ibn al-Walid Abū Sulaymān Khālid ibn al-Walīd ibn al-Mughīrah al-Makhzūmī (Arabic: أبو سليمان خالد بن الوليد بن المغيرة المخزومي‎ ‎ ‎; 585–642), also known as Sayf ullah al-Maslūl (Arabic: سيف الله المسلول‎ ‎ ; "Drawn Sword of God"), was a companion of Muhammad. He is noted for his military tactics and prowess, commanding the forces of Medina under Muhammad and the forces of his immediate successors of the Rashidun Caliphate, Abu Bakr and Umar ibn Khattab. It was under his military leadership that Arabia, for the first time in history, was united under a single political entity, the Caliphate. Commanding the forces of the nascent Islamic state, Khalid was victorious in over a hundred battles, against the forces of the Byzantine-Roman Empire, Sassanid-Persian Empire, and their allies, in addition to other Arab tribes. His strategic achievements include the conquest of Arabia during the Ridda Wars, Persian Mesopotamia and Roman Syria within several years from 632 to 636. He is also remembered for his decisive victories at Yamamah, Ullais, and Firaz, and his tactical successes at Walaja and Yarmouk.
Abdullah ibn Mubarak ʿAbd Allāh ibn al-Mubārak (118/726-797 AH/CE; Arabic: عبد الله بن المبارك) was born during the reign of Hisham ibn Abd al-Malik. ‘Abdullah ibn Mubarak was an early, pious Muslim known for his memory and zeal for knowledge, collected hadīth (muhaddith), and was remembered for his asceticism. He earned the title "Amir al-Mu'minin fi al-Hadith". His father, named Mubarak, was Turkmanish from Khurasan and became a client (mawālī) of an Arab trader from the tribe of Banī Hanẓala in the city of Hamadhān, and his mother was said to have been from Khwārizm. Mubarak later married Hind, the trader's daughter. It is said that ‘Abdullah ibn Mubarak left his hometown of Merv, and while living in Hamadhān, went on to visit and speak often in Baghdād. Imam Ahmad said about Abdullah ibn Mubarak that there was no one more eager to travel for seeking knowledge than him. His teachers included Sufyān al-Thawrī and Abū Hanīfa. He wrote Kitāb al-Jihād, a collection of hadīth and sayings of the early Muslims on war, and Kitāb al-Zuhd wa al-Rāqa’iq, a book on asceticism. He was also known for defending Islamic borders (see Ribat) on the frontiers of Tarsus and al-Massisah, and later died at Hīt, near the Euphrates, in the year 797 CE.