Hadith: O Messenger of Allah, what if a man comes to me wanting to take my money? He said: Then do not give him your money

عن أبي هريرة رضي الله عنه قال: جاء رجل إلى رسول الله صلى الله عليه وسلم فقال: يا رسول الله، أَرَأَيتَ إن جاء رجُل يُريد أَخْذَ مالي؟ قال: «فلا تُعْطِه مالك» قال: أَرَأَيتَ إن قَاتَلَني؟ قال: «قَاتِلْه» قال: أَرَأَيتَ إن قَتَلَنِي؟ قال: «فأنت شهيد» قال: أَرَأَيتَ إن قَتَلْتُه؟ قال: «هو في النَّار».
[صحيح] - [رواه مسلم]

Abu Hurayrah (may Allah be pleased with him) reported: A man came to the Messenger of Allah (may Allah's peace and blessings be upon him) and said: "O Messenger of Allah, what if a man comes to me wanting to take my money?" He said: "Then do not give him your money." The man said: "What if he fights with me?" He said: "Then fight with him." The man said: "What if he kills me?" He said: "Then, you would be a martyr." The man said: "What if I kill him?" He said: "He would be in the Hellfire."
Sahih/Authentic. - [Muslim]

Explanation

A man came to the Messenger of Allah (may Allah's peace and blessings be upon him) and asked him what he had the right to do if a man came to him wanting to take his money unjustly. The Messenger of Allah replied: "Do not give him your money." The man asked what he had the right to do if that aggressor fought with him (over the money). The Messenger of Allah (may Allah's peace and blessings be upon him) told him to defend his money even if that led to fighting with that man, but first he had to try to ward him off by easier means, such as screaming for help or scaring him with a stick or shooting a bullet in the air. The man asked: What if he overpowered me and killed me; what would my fate be? The Prophet (may Allah's peace and blessings be upon him) said: You will have the reward of dying as a martyr. Then the man asked: What if I overpowered him and killed him while defending my property; what would my fate be? The Prophet (may Allah's peace and blessings be upon him) said: He will be in the Hellfire for an interval of time unless he believed that what he had done was lawful, for, if he did, then, in that case, he would remain in the Hellfire eternally, because he holds as lawful a deed that is unequivocally known to be unlawful in Islam.