What did the Prophet Muhammad (saw) say about Moses' (may Allah have mercy on him) excuse of forgetfulness?
      Narrated Ubai bin Ka'b:                          that he heard Allah's Apostle saying, "(Moses) said, 'Call me not to      account for what I forget and be not hard upon me for my affair (with      you)' (18.73) the first excuse of Moses was his forgetfulness."