The Vaidika sandhya is the rite performed by the twice-born castes thrice a day, at morning, midday, and evening. The morning sandhya is preceded by the following acts. On awakening, a mantra is said in invocation of the Tri-murtti and the sun, moon, and planets, and salutation is made to the Guru. The Hindu dvi-ja then recites the miantra: "I am a Deva. I am indeed the sorrowless Brahman. By nature I am eternally free, and in the form of existence, intelligence, and Bliss." He then offers the actions of the day to the Deity, confesses his inherent frailty, and prays that he may do right. Then, leaving his bed and touching the earth with his right foot, the dvi-ja says, "Om, 0 Earth! salutation to Thee, the Guru of all that is good." After attending to natural calls, the twice-born does achamana (sipping of water) with mantra, cleanses his teeth, and takes his early morning bath to the accompaniment of mantra. He then puts on his caste-mark (tilaka) and makes tarpanam, or oblation of water, to the Deva, Rishi, and Pitri. The sandhya follows, which consists of achamana (sipping of water), marjjana-snanam (sprinkling of the whole body with water taken with the hand or kasha-grass), pranayama (regulation of prana through its manifestation in breath), agha-marshana (expulsion of the person of sin from the body; the prayer to the sun, and then (the canon of the sandhya) the silent recitation (japa) of the Gayatn mantra, which consists of invocation (avahana) of the Gayatri-Devi; rishi-nyasa and shadanga-nyasa, meditation on the Devi-Gayatri in the morning as Brahmani; at midday as Vaishnavi; and in the evening as Rudrani; japa of the Gayatri a specified number of times; dismissal (visarjana) of the Devi, followed by other mantra. Besides the Brahmanical Vaidiki-sandhya from which the Shudras are debarred, there is the Tantriki-sandhya, which may be performed by all. The general outline is similar; the rite is simpler; the mantra vary; and the Tantrika-vijas or "seed" mantras are employed.