It is recommended to perform the call to prayer while standing when the muezzin calls for the congregation, and it is disliked for him to call while sitting; because people have inherited this practice, so one who neglects it is considered to be in error for contradicting the consensus of the community; and because the complete announcement is while standing. It was narrated from Abd al-Jabbar ibn Wa'il from his father who said: "It is a right and a prescribed Sunnah that a man should not call to prayer unless he is in a state of purity, and he should not call unless he is standing," as found in the Sunan al-Bayhaqi al-Kabir 1: 392, and Musannaf Abd al-Razzaq 1: 465, and in the Takhlees 1: 205: its chain is good except that there is a break in it. See: Al-Durr al-Mukhtar 1: 260, and Al-Wiqayah p. 140.