There is neither excess nor negligence in the Sunnah.

This is explained by what is rigorously authenticated in the two Ṣaḥīḥ collections, where the Messenger of Allah, peace and blessings be upon him, said:

“Whoever believes in Allah and the Last Day, let him speak good or remain silent.”

Speaking good is better than withholding it, while keeping silent about evil is better than uttering it. Perpetual silence, however, is a forbidden innovation, and so too is abstaining from bread, meat, or even water—these are likewise blameworthy innovations.

In Ṣaḥīḥ al-Bukhārī it is related from Ibn ʿAbbās (may Allah be pleased with them both) that the Prophet, peace and blessings be upon him, saw a man standing in the sun. He asked, “What is this?” They replied, “He is Abū Isrāʾīl; he vowed to stand in the sun, to seek no shade, to remain silent, and to fast.” The Prophet said, “Command him to sit down, to take shade, to speak, and to complete his fast.”

Likewise, in the two Ṣaḥīḥs it is reported from Anas that some men asked about the worship of the Messenger of Allah, peace and blessings be upon him. When they were informed, they deemed it too little and said, “And who among us is like—”