How was the Prophet Muhammad (saw) affected when he heard the news of the killing of the 70 "reciters" at Bi'r Ma'una?
 'Asim reported - I heard Anas saying:                      Never did I ace the Messenger of Allah (may peace be upon him) so much grieved (at the loss of a) small army as I saw him grieved at those seventy men who were called" reciters" (and were killed) at Bi'r Ma'una; and he invoked curse for full one month upon their murderers.