How much of the things Jesus said to the Nephites did Mormon write down?

0 How much of the things Jesus said to the Nephites did Mormon write down?

Soon ... they that do wickedly shall be as stubble; and I will burn them up. Doctrine & Covenants 29:9

There cannot be written in this book even a hundredth part of the things which Jesus did truly teach. 3 Nephi 26:6

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