Hadith #4132The Book of the Sunnah · Narrated by Abu Bakr bin Abi Shayba أبو بكر بن أبي شيبة, Aisha bint Abi Bakr, Ali bin Muhammad bin Ishaq al-Tanafasi علي بن محمد بن إسحاق الطنافسي, Da'ud bin Mdrk داود بن مدرك, Musa bin 'Ubaida bin Nashayt موسى بن عبيدة بن نشيط, Ubaidullah bin Musa bin Abi al-Mukhtar عبيد الله بن موسى بن أبي المختار باذام, Urwa ibn al-Zubayr عروة بن الزبير
“The Messenger of Allah (ﷺ) said: ‘Faith has sixty-some or seventy parts, the least of which is to remove a harmful thing from the road and the greatest of which is to say La ilaha illalah (none has the right to be worshipped but Allah). And modesty is a branch of faith.'”
Another chain from Abu Hurairah, from the Prophet (ﷺ) with similar wording.