How sound is the sermon attributed to Imam Zayn al-Abidin Ali ibn al-Husayn, and is it authentic or does it contain modifications, taking into consideration the sermon attached to the question?

The aforementioned sermon is not mentioned in the books of Sunnah, history, or literature. However, the virtues of Zayn al-Abidin and the Ahl al-Bayt are mentioned in authentic books of Sunnah. Ahl al-Sunnah wal-Jama'ah believe in loving, respecting, and revering the Ahl al-Bayt. Zayn al-Abidin's contemporaries appreciated him for his knowledge, worship, and generosity. He was renowned for his generosity and for concealing his charitable acts, and scholars praised him for his trustworthiness, piety, and virtue. Al-Farazdaq's famous poem demonstrates the people's veneration for him.