This article, from the Darul Islam Family website, is the first part of a biographical series about Ubadah bin al-Samit (RA). It recounts his participation in key Islamic events, such as the Battles of Badr, Uhud and Khandaq and his role in the two pledges of Aqaba. It details Ubadah's strong stance against injustice and commitment to Islamic principles. The article highlights his involvement in expelling the Banu Qaynuqa Jewish tribe from Medina and his later service as a judge and teacher in Palestine. It emphasizes Ubadah's courage, piety, and the high regard in which he was held by both the Prophet Muhammad (PBUH) and Caliph Umar (RA). The author, Nooruddin, draws from historical accounts to illustrate Ubadah's significant contributions to early Islam.