Did the Prophet Muhammad (SAW) give the nickname "Sword of Allah" to Khalid bin Waleed? Additionally, was Khalid bin Waleed appointed as a military commander before or after the death of the Prophet Muhammad (SAW)?
The Prophet Muhammad (SAWA) never gave the title “Sword of Allah” to Khalid bin Waleed, on the contrary, he said : O Allah, I disassociate myself from what Khalid bin Al-Waleed committedاللهم إني أبرأ إليك مما صنع خالد بن الوليد . (Saheeh Al-Bukhari; page 7189 and 4339,
Saheeh Al-Nasaa'ee by Al-Albanian; page 5420,
Al-Shawkani in Nayl Al-Awtaar نيل الأوطار، 8/9,
Al-Muhalla by Ibn Hazm; 10/368
Al-Estee'aab by Ibn abdil Barr, 2/12
Khalid bin Al-Waleed was a friend of Abu Bakr who appointed him as military leader. Omar called Khalid as enemy of Allah. (Ibn Al-Atheer; Al-Bidayah wal-Nihayah 9/461
Al-Dhahabu ; Siyar A;Kaamil Al-Nubalaa' ;1/378
Tareekh Al-Tabari; 2/213.
Wassalam.