sentences:  In 1993 Mirza Tahir Ahmad, the fourth Ahmadiyya Caliph, internationalised the "Bay'ah" through Muslim Television Ahmadiyya International (MTA) by which people from all over the world were now able to partake in this pledge which would be simultaneously translated into 12 different languages.Since then, The international oath of allegiance has taken place every year at the annual gatherings.Ahmad often claimed that this was the historical fulfillment of the Pentecost that was destined to occur at the time of the Second Coming.