Hadith #23 (The Forty Hadith of Imam Nawawi)
Book: Purity is half of faith; virtues of remembrance and worship
Narrator(s): Abu Malik al-Harith ibn Asim al-Asharee
Grade: Sahih

The Messenger of Allah (peace and blessings of Allah be upon him) said, “Purity is half of iman (faith). ‘Al-hamdu lillah (praise be to Allah)’ fills the scales, and ‘subhan-Allah (how far is Allah from every imperfection)’ and ‘Al-hamdulillah (praise be to Allah)’ fill that which is between heaven and earth. And the salah (prayer) is a light, and charity is a proof, and patience is illumination, and the Qur’an is a proof either for you or against you. Every person starts his day as a vendor of his soul, either freeing it or causing its ruin.”

Source: https://parallelquran.com/hadith/forty-nawawi-23/