ENOfficial
Anas ibn Malik reported that the Prophet, may Allah bless him and grant him peace, said, "Make things easy and do not make things difficult. Calm people and do not arouse their aversion."
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا آدَمُ، قَالَ: حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي التَّيَّاحِ قَالَ: سَمِعْتُ أَنَسَ بْنَ مَالِكٍ قَالَ: قَالَ النَّبِيُّ صلى الله عليه وسلم: يَسِّرُوا وَلاَ تُعَسِّرُوا، وَسَكِّنُوا ولا تُنَفِّرُوا.
sunnah.com