Sunan Abi Dawud, Hadith 4667 ⓘ
Explaining the verse, “say ; You have no faith, but you only say : We have submitted our wills to Allah”, Al-Zuhri said : We think that ISLAM is a word, and faith is an action.
حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدٍ، حَدَّثَنَا ابْنُ ثَوْرٍ، عَنْ مَعْمَرٍ، قَالَ وَقَالَ الزُّهْرِيُّ { قُلْ لَمْ تُؤْمِنُوا وَلَكِنْ قُولُوا أَسْلَمْنَا } قَالَ نَرَى أَنَّ الإِسْلاَمَ الْكَلِمَةُ وَالإِيمَانَ الْعَمَلُ .
also referenced under: Hadith 4684 (DarusSalam)