A rule regarding indulging in the enemy and is it permissible?

Translation

This book by Sheikh al-Islam Ibn Taymiyyah deals with a delicate jurisprudential issue related to the rulings on jihad, which is the ruling on a Muslim immersing himself in the ranks of the enemy when there is a strong suspicion that he will be killed, and discusses the legitimacy of that and its evidence from the Qur’an and Sunnah. The book falls within the classification of jihadi jurisprudence, as it presents images of the issue and reviews the legal evidence supporting it, with a focus on the controls of legitimate jihad.