السلام عليكم ورحمة الله وبركاته Ustadh, is it sufficient to only move the lips while praying in silent prayers or must one make a bit of sound while reciting?

Ustadh AbdulAziz al-Haqqan

U need to say may Allah reward you even if it is in a low voice that only u can hear so air also comes out of your mouth. Baraka Allahu feekum