Qays ibn Makshuh

[9] The threat to the authority of Medina, however, was renewed in the person of Qais ibn Makshuh himself, as he felt slighted when Abu Bakr confirmed Fairuz as administrator of Yemen.

[9] Meanwhile, another source suggested [10] Qays rebelled along with Amr ibn Ma'adi Yakrib as both conspired to kill three caliphate deputies in Yemen.

[11] After Ridda wars, Qays mobilizing his own wealth and led the soldiers from Yemen that came to Medina to participate in early Muslim conquests.

[9] On the onset of the famous battle of Yarmuk in 636 AD, around 3,000 cavalry reinforcements were sent to the Muslim conquest of Syria front, including those from Yemen which led by Qays ibn Makshuh.

[16] As the battle ended at night, almost the whole 80,000 soldiers of Byzantine under Saqlar were slain, while the Rashidun forces suffered several hundreds of casualties.

[17] In the battle of al-Yarmuk, Khalid ibn al-Walid appoint Qays al-Makshuh as commander of the cavalry on the left wing rear.

[23] As the battle started According to firsthand witness named Muhaffiz, al Qa'qa units including Amr and the others managed to slip inside the trench between Jalula fortress and the still engaging Sassanid army, capturing the said trench while the main army of Sassanid under command of Khurrazad still busy fight the Rashidun main forces.