What is the virtue of reciting Surat Taha, and has any specific virtue been reported for reciting it three times every night for a certain period?

There are authentic hadiths regarding the virtues of Surat Taha. Among them is what Abdullah ibn Mas'ud (may Allah be pleased with him) narrated, that Surat Taha is among the "first ancient ones" and "my old memorized ones," meaning it was among the earliest chapters revealed from the Quran and among the first that Ibn Mas'ud memorized. It is favored for containing stories of prophets and nations. Abu Umamah (may Allah be pleased with him) mentioned that Allah's Greatest Name (Ism al-A'dham) is in three surahs: Al-Baqarah, Aal Imran, and Taha. Al-Albani prefers that it is in the verse: (Indeed, I am Allah. There is no deity except Me).

There are weak and fabricated hadiths concerning the virtues of Surat Taha, including: 1. The hadith: "Indeed, Allah, blessed and exalted be He, recited Taha and Yasin a thousand years before He created the heavens and the earth." This is a very weak and denounced hadith. 2. The hadith: "I was given Taha, Tawasin, and Hawamim from the Tablets of Moses." This hadith has a weak chain of narration. 3. The supplication of the Prophet (peace be upon him): "O Lord of Taha and Yasin, and O Lord of the Magnificent Quran." This is a fabricated hadith, with no disagreement among scholars regarding its fabrication. 4. The hadith: "Whoever recites Taha will be given the reward of the Muhajireen and Ansar on the Day of Judgment." This is a fabricated hadith.

It has not been reported in books of Sunnah or fabricated narrations that reciting Surat Taha three times every night has any specific virtue. It is important to be aware and cautious about acting upon weak or fabricated Sunnah.