بسم الله الرحمن الرحيم
The book of Imam Ahmad ibn Hanbal (may Allaah have mercy on him) 164-241g.h.
Message of "Fundamentals of the Sunnah" Imam Ahmad ibn Hanbal, may Allaah have mercy on him, represents those rules, which must adhere to every Muslim to learn about them. After all, these are the basics of management and the way to salvation and happiness in both worlds, as they collected belief of the first generations of our community, but Allah be pleased with them. And in the words of Imam Malik, may Allaah have mercy on him: "I do not succeed the last generation of this community, except by order, whereby the first of her generation have succeeded." See. "Al-Shifa" 2/676.
"If someone went to China to study the book (Fundamentals of the Sunnah), then this would not be enough ...."
Ya'lya Abu al-Hanbali.