It is narrated from Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whatever (matter) I have left for you, then leave me in that as well, for the nations before you were destroyed because of their excessive (unnecessary) questioning and their disagreements with their prophets. And whatever I command you to do, do as much of it as you are able, and whatever I forbid you from, then abstain from it."
Hadith Referenceمسند الإمام الشافعي / كتاب فضائل قريش وغيرهم وأبواب متفرقة / 1801
Hadith Takhrijاخرجه البخارى، الاعتصام بالكتاب والسنة، باب الاقتداء بسنن رسول الله (728) ومسلم، الحج، باب فرض الحج مرة في العمر (1337)۔