Nandin said: On the top of the Liṅga he shall worship the unsullied, imperishable Lord, shining like a crystal glass, the cause of all Devas, identical with the universe, imperceptible to the sages, Devas, Brahmā, Indra, Viṣṇu, Rudra and others. The Śruti says “He is imperceptible through even Vedāntas, to the knowers of the Vedas too”. He is devoid of beginning, middle and end. He is a medicine unto those who are afflicted by the sickness of worldliness.[20] He is known as Śivatattva (Principle of Śiva) and is stationed in the Śiva Liṅga. He shall duly repeat the prayers and make obeisance. He shall circumambulate, offer Arghya, scatter flowers at the feet, bow to the lord of Devas and superimpose Śiva on the Atman. This, in brief, is the procedure of worshipping Śiva in Liṅga. Now I shall describe the internal worship of Liṅga to you.