What is the meaning of the saying of the Prophet (peace and blessings be upon him): "The right of a Muslim over a Muslim is six..."? And is each of them obligatory?

The questioner : In the name of Allah, the Most Gracious, the Most Merciful.
May Allah guide you and protect you, O honorable Shaykh. Abu Hurayrah (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: What is the meaning of ? And are they obligatory or a recommended practice?

The Shaykh : Yes, the original ruling when the Messenger of Allah (peace and blessings be upon him and his family) says: is that it is obligatory, because rights must be fulfilled. The scholars said that the word "upon" indicates obligation. However, if there is an indication that it is not obligatory, that indication is followed. For example, among these rights is , and initiating the greeting is a recommended practice, not obligatory, except when it exceeds three days, in which case it becomes obligatory.
This is because it is permissible for a Muslim to boycott his brother for less than three days, but if it exceeds that, it is not permissible for him to do so, based on the saying of the Prophet (peace and blessings be upon him and his family): . Nevertheless, we say that boycotting him during these three days should not be done unless there is a benefit, such as if the person being boycotted is committing a sin, and boycotting him and not greeting him leads to abandoning that sin. In that case, the boycott is good. The summary of the answer is that we say: if the wording comes in this form, , then the original ruling is obligation, unless the evidence indicates that it is for recommendation.