Volume 8 · Book 73 · Hadith 146
Narrated Anas bin Malik: The Prophet said, "Make things easy for the people, and do not make it difficult for them, and make them calm (with glad tidings) and do not repulse (them )."
— Sahih Bukhari, Volume 8, Book 73: Good Manners and Form (Al-Adab), Hadith #146