The Messenger of Allah ﷺ said, "What I fear for my nation is the Book and milk."Someone asked, "Messenger of Allah, what about the Book?"He replied, "The hypocrites will learn it and then use it to argue against the believers."It was asked, "And what about milk?"He said, "People will grow fond of milk, so they will leave the congregations and abandon the Friday prayers."
قال حدثنا حسن بن موسى قال حدثنا ابن لهيعة قال حدثنا أبو قبيل قال سمعت
قال رسول الله ﷺ إنما أخاف على أمتي الكتاب واللبن قال قيل يا رسول الله ما بال الكتاب قال يتعلمه المنافقون ثم يجادلون به الذين آمنوا فقيل وما بال اللبن قال أناس يحبون اللبن فيخرجون من الجماعات ويتركون الجمعات
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Its isnad is hasan because of Ibn Lahia. Abu Qabil is Huyayy bin Hani al-Maafiri, who is trustworthy. Bukhari narrated from him in Adab. It was also graded hasan in Majma 2/194.