It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said to me, and this was the first comprehensive advice he (peace and blessings be upon him) gave me: "O my dear son! Keep my secret hidden; you will become a complete believer." Sayyiduna Anas (may Allah be pleased with him) further relates that (such was his observance of this advice of the Prophet (peace and blessings be upon him) that) my mother and the pure wives of the Messenger of Allah (peace and blessings be upon him) would ask me about his (peace and blessings be upon him) hidden secret, but I would never tell them about it; and I will never inform anyone at all of any secret of the Messenger of Allah (peace and blessings be upon him).
Imam Abu Ya'la narrated it through the route of Yahya bin Ayyub, Muhammad bin Husayn bin Abi Yazid and Abbad al-Minqari, while Imam Ahmad bin Mani' narrated it through Yazid bin Harun and al-Ala' Abu Muhammad, likewise from Sayyiduna Anas (may Allah be pleased with him).
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الأدب / 2689
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :—. » «أخرجه صحيح البخاري برقم: 5884، وأخرجه المعجم الأوسط للطبراني برقم: 5988، وأخرجه المعجم الصغير للطبراني برقم: 823، وأخرجه مجمع الزوائد ومنبع الفوائد برقم: 1470، وأخرجه إتحاف الخيرة المهرة بزوائد المسانيد العشرة برقم: 540/1، 749، 7194/1»