Śiva Tāṇḍava Stotra of Rāvaṇa. This was the stotra which he recited to obtain the Vaidyanātha Jyotirliñga (a.k.a Baijnāth). Rāvaṇa would have become immortal if that jyotirliñga had reached Śrī Lanka. This is the teaching he gave to attain mokṣa finally at the hands of Lord Rāma. This stotra must be recited in the end of the prayers, meditation or pūjā. Students of the Śiva Purāṇa course (ŚIVA Group of Zoran Radosavljevic, 2010) were taught this stotra recitation by Sarbani Rath.
The detailed translation was given in the old Jyotish Digest.