In this video-clip, posted on the Internet on August 18, 2014, the preacher at a mosque in Al-Raqqah, Syria, says: "The whole world has witnessed the greatest events in contemporary history: The caliphate has been declared, and the Muslims have been appointed a caliph." Following the sermon, the mosque-goers pledged allegiance to the Emir of the Believers, and cried: "We pledge to hear and obey."
Preacher: In the month of Ramadhan this year, the whole world has witnessed the greatest events in contemporary history: The caliphate has been declared, and the Muslims have been appointed a caliph, who would preserve the religion and guide this world, in accordance with the law of Allah and His religion. This was the fulfillment of the promise of the Prophet: "A caliphate will be established on the prophetic path." In this blessed month, the borders of the nation states, which had divided the Muslims, were shattered after decades of dispersal and disintegration. In this blessed month, Allah enabled His Muslim monotheistic mujahideen to conquer countries and lands, and to liberate military bases, airports, and headquarters of large units. All this was achieved by the grace of Allah.
[...]
Say: "We pledge allegiance to the Emir of the Believers."
Crowd: We pledge allegiance to the Emir of the Believers.
Preacher: Abu Bakr...
Crowd: Abu Bakr...
Preacher: Ibrahim...
Crowd: Ibrahim...
Preacher: Al-Hussaini Al-Kurayshi.
Crowd: Al-Hussaini Al-Kurayshi.
Preacher: We pledge to hear and obey.
Crowd: We pledge to hear and obey.
[...]
Preacher: Say: "Allah Akbar."
Crowd: Allah Akbar, Allah Akbar, Allah Akbar.
Preacher: The Islamic State...
Crowd:...is here to stay.