Sahih al-Bukhari, Book 78, Hadith 152 (In-Book) ⓘ
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 ).
حَدَّثَنَا آدَمُ، حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي التَّيَّاحِ، قَالَ سَمِعْتُ أَنَسَ بْنَ مَالِكٍ ـ رضى الله عنه ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " يَسِّرُوا وَلاَ تُعَسِّرُوا، وَسَكِّنُوا وَلاَ تُنَفِّرُوا " .
also referenced under: Hadith 6125 (DarusSalam) & Volume 8, Book 73, Hadith 146 (USC-MSA)