Mbh 9.38.3a

"The Rishi said, 'Why, seest thou not, O Brahmana, that a vegetable juice is flowing from this wound of mine? Seeing this, O lord, I am dancing in great joy!' Laughing at the Rishi who was stupefied by passion, the god said, 'I do not, O Brahmana, at all wonder at this! Behold me!' Having said this unto that foremost of Rishis, Mahadeva of great intelligence struck his thumb with the end of one of his fingers. Thereupon, O king, ashes, white as snow, came out of that wound. Seeing this, the Rishi became ashamed, O monarch, and fell at the feet of the god. He understood the god to be none else than Mahadeva. Filled with wonder, he said, 'I do not think that thou art any one else than Rudra, that great and Supreme being! O wielder of the trident, thou art the refuge of this universe consisting of gods and Asuras! The wise say that this universe hath been created by thee! At the universal destruction, everything once more enters thee! Thou art incapable of being known by the gods, how then canst thou be known by me? All forms of being that are in the universe are seen in thee! The gods with Brahman at their head worship thy boon giving self, O sinless one! Thou art everything! Thou art the creator of the gods and it was thou who hadst caused them to be created! Through thy grace, the gods pass their time in joy and perfect fearlessness!' Having praised Mahadeva in this manner, the Rishi bowed to him, 'Let not this absence of gravity, ridiculous in the extreme, that I displayed, O god, destroy my ascetic merit! I pray to thee for this!' The god, with a cheerful heart, once more said unto him 'Let thy asceticism increase a thousandfold, O Brahmana, through my grace! I shall also always dwell with thee in this asylum! For the man that will worship me in the tirtha Sapta-Saraswat there will be nothing unattainable here or hereafter. Without doubt, such a one shall go to the region called Saraswat (in heaven) after death!