Suicide bombings in Muslims lies with interpretation of jihad. Islamic writing feature jihad as physical warfare. Islamic jurisprudence has distinguished four different ways in which a believer may fulfill jihad obligations. With the faith in his heart, by preaching and proselytizing with his tongue, by good deeds with his hands and by confronting unbelievers or enemies with the sword. In practice, the first three a part of the da'wa (missionary activity), actions that support jihad by the sword.