"The final words of the Adhan of Bilal were: 'Allahu Akbar, Allahu Akbar, Allahu Akbar; La ilaha illallah (Allah is the Greatest, Allah is the Greatest, there is none worthy of worship except Allah.)'" (Using translation from Nasāʾī 650)
كَانَ آخِرُ أَذَانِ بِلَالٍ «لَا إِلَهَ إِلَّا اللهُ وَاللهُ أَكْبَرُ»