Ibn Mas'ud reported God’s Messenger as saying, “The best of men are my generation, then those who come next to them, then those who come next to them. Afterwards people will come who will give testimony before swearing an oath and swear an oath before giving testimony.” (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب الإمارة والقضاء / 3767
Hadith Gradingالألبانی:مُتَّفَقٌ عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (3651) و مسلم (2533/212)»