Shaykh al-Islām wrote to al-Malik al-Nāsir after the battle of Mount Keserwan, concerning the conquest of the mountain:

In the name of Allah, the Most Merciful, the Ever Merciful.

From Ahmad ibn Taymiyyah, who prays for you, to the Sultan of the Muslims, in whose reign Allah has strengthened the religion, honored His believing servants, and subdued the disbelievers, the hypocrites, and the renegade Khawārij. May Allah grant him victory and grant Islam victory through him; set right, for him and through him, the affairs of the elite and the common people; revive through him the signs of faith; establish through him the ordinances of the Quran; and humble through him the people of disbelief, wickedness, and disobedience.

Peace be upon you, and Allah’s mercy and blessings. In addressing you, we praise Allah, besides whom there is no god. He is worthy of all praise and has power over all things. We ask Him to bestow blessings upon the Seal of the Prophets and leader of the God-fearing, Muhammad, His servant and Messenger—may Allah bless him and his family and grant them peace.

To proceed: Allah has indeed fulfilled His promise, granted victory to His servant, honored His army, and alone defeated the confederates. Allah has bestowed upon the Sultan and the believers during his reign blessings unprecedented in past centuries. He has brought about such a renewal of Islam during his reign