It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Holy Prophet (peace and blessings be upon him) said: Two men will not be gathered together in Hell in such a way that one harms the other: the Muslim who kills a disbeliever and then adopts the straight path, and the dust of jihad in the way of Allah and the smoke of Hell cannot be gathered together in the nostrils of a Muslim. Similarly, faith and miserliness cannot be gathered together in the heart of a Muslim.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 8479
Hadith Gradingحکم دارالسلام:صحيح، وهذا إسناد قوي، م: 1891