(271) بَابُ الْحَيَاءِ
Abu Hurayra reported that the Prophet, may Allah bless him andgrant him peace, said, "Faith consists of sixty (or seventy) branches.The best of them is 'There is no god but Allah.' The lowest of them isto remove harmful things from the road. Modesty is also a branch of faith."
Reference: Al-Adab Al-Mufrad 598
In-book reference: Book 30, Hadith 61
English translation: Book 30, Hadith 598