The uniqueness of the memory of Hishaam Bin Al-Kalbi was such that he had made hifz of the entire Qur’aan Majeed in three days. No one else had ever achieved this feat.
One act of his forgetfulness was equally unique. Once when he intended to trim his beard to the Masnoon length of one fist, he held it in his hand. Instead of cutting below his fist, he cut his beard above his fist.