heart or both? Recently I had issues with sleeping and I was like zombie in fajr prayers. I always inform my sons tt I can and will inform them if I hear them recite or read their hifz wrongly be it everyday practice or even solat. Because that's what we each must do as we learn. To correct each other's mistakes, not something we do, to want to embarrass each other but intention is to help sharpen each other's hifz. So I forced myself to stay awake in this 1 fajr prayer but my mind was already groggy. Somehow my youngest as imam, made a mistake with a simple Juz 30 sura. And suddenly my heart perk up n corrected him thru my mind and mouth in the solat. And I wasn't aware mentally but the heart kinda triggered the mind to correct it. Now I understand why, some teachers say hifz must also use the heart to remember.