Anas bin Malik reported,

The Messenger of Allah ﷺ came to me while I was playing with the other boys. He greeted us, then sent me on an errand, which made me late returning to my mother.When I came home, she asked, "What kept you?"I said, "The Messenger of Allah ﷺ sent me on an errand."She asked, "What was his errand?"I said, "It is a secret."She said, "Then do not tell anyone the secret of the Messenger of Allah ﷺ."Anas said, "By Allah, if I were to tell it to anyone, I would have told you, Thabit."

Muslim 6378

Sahih

حدثنا أبو بكر بن نافع حدثنا بهز حدثنا حماد أخبرنا ثابت

عن أنس قال

أتى علي رسول الله ﷺ وأنا ألعب مع الغلمان قال فسلم علينا فبعثني إلى حاجة فأبطأت على أمي فلما جئت قالت ما حبسك قلت بعثني رسول الله ﷺ لحاجة قالت ما حاجته قلت إنها سر قالت لا تحدثن بسر رسول الله ﷺ أحدا قال أنس والله لو حدثت به أحدا لحدثتك يا ثابت

مسلم 6378صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Virtues of the Companions, may Allah be pleased with them
Chapter
From the virtues of Anas bin Malik, may Allah be pleased with him
Numbering
Darussalam 6378
Muslim 6378