Ali bin Abu Talib reported,

Speak to people according to what they can understand. Would you want Allah and His Messenger to be called liars?

Bukhari 127

Sahih

وقال علي حدثوا الناس بما يعرفون أتحبون أن يكذب الله ورسوله حدثنا عبيد الله بن موسى عن معروف بن خربوذ عن أبي الطفيل عن علي بذلك

البخاري 127صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Knowledge
Chapter
Those who taught knowledge to some people and not others, fearing they would not understand
Numbering
Darussalam 127
Bukhari 127