It was narrated that 'Ali bin Abu Talib said:
"The Messenger of Allah (ﷺ) said: 'Faith is knowledge in the heart, words on the tongue and action with the physical faculties. (limbs of the body).'" (Maudu') (DE)
English reference (DE): Vol. 1, Book 1, Hadith 65 (DE)
Arabic reference (DE): Book 1, Hadith 68 (DE)