Ata reported that Ibn Abbas sent (him) to Ibn Zubair at the commencement of the oath of allegiance to him (for Caliphate saying): As there is no Adhan on Id-ul-Fitr, so you should not pronounce it. Ibn Zubair did not pronounce Adhan on that day. He (Ibn Abbas) also sent him (with this message) that sermon (is to be delivered) after the prayer, and thus it was done. So ibn Zubair observed prayer before Khutbah.