Immediate Martyrdom on Embracing Islam

One of such fortunate person was a Jew at the time of the battle of Uhud. His name was `Makhreeq'.
He addressed his tribesmen as follows: "You are not aware that Muhammad (s.a.w.s.) is the truthful and the promised Prophet." They replied, "How do you know we are not aware?" "Then why don't you come for his help?" he asked. The tribe said. "Today is Saturday (sabbath)." He said, "But that was at the time of Hadhrat Musa (a.s.), it is abrogated by the Holy Prophet (s.a.w.s.) and is not acceptable to him."
When he did not receive any response from the people of his tribe he went to the Holy Prophet (s.a.w.s.) and became a Muslim. He was extremely wealthy. He entrusted all his wealth to the Holy Prophet (s.a.w.s.) and himself entered the battlefield to face the unbeliever. He was soon martyred. It is said that the Holy Prophet (s.a.w.s.) often gave charity from the property of Makhreeq, the martyr.
(extract from the book "Greater Sins" by Shaheed DastGhaib)