Explanation of the hadith of Ibn Mas'ud (may Allah be pleased with him): "The worst of the morals of a believer is foul speech," and a discussion of the last hadith in the chapter.

The Shaykh : ... However, this hadith is not marfu' (traced to the Prophet) to the Messenger of Allah (peace and blessings be upon him), but rather it is from the saying of Ibn Mas'ud himself.
What did he say? In the terminology of hadith scholars, this type of hadith is called mawquf (stopping at a Companion), and its counterpart is marfu' (traced to the Prophet). If we see in a book: "This is a marfu' hadith," that is an abbreviation for their saying: "The Messenger of Allah (peace and blessings be upon him) said." Conversely, if we see in a book: "This is a mawquf hadith," that is an abbreviation for: "So-and-so, the noble Companion, said." Likewise, if it says: "It was narrated as marfu'," that is an abbreviation for "from the Messenger of Allah." Similarly, if it says: "It was narrated as mawquf," that is an abbreviation for "from the saying of some of the Companions," and so on.
The last hadith in this chapter is a weak hadith.