What is the meaning of the statement that Mu'adh (may Allah be pleased with him) said that hadith out of a sense of guilt?

The questioner : I found some narrations that Mu'adh said it out of a sense of guilt, meaning he believed that this was discharging a guilt? It is obligatory, yes, meaning he said it while believing that he had fulfilled

The Shaykh : an obligation upon him. But how could he believe that he had fulfilled an obligation upon him when the Messenger (peace and blessings be upon him) said, "Do not give them glad tidings"? We are astonished at what we heard from him. Either he understood the prohibition to be one of dislike, or he understood that the cause which the Messenger (peace and blessings be upon him) feared had ceased, and that this address is general and it is necessary to convey it to the people.