The phrase referring to comes from a verse in the Qur'an, specifically Surah At-Tawbah (9:29), which addresses the relationship between Muslims and non-Muslims, particularly "People of the Book" (Christians and Jews) under certain historical contexts, especially during early Islamic rule.
Understanding the Verse:
Surah At-Tawbah 9:29 states:
"Fight those who do not believe in Allah or in...