Matsyapurana 141.37

141.37

tatkālaṃ sūryamuddiśya dṛṣṭvā saṃkhyātumarhasi
sa caiva satkriyākālaḥ ṣaṣṭhaḥ kālo 'bhidhīyate //

When the Sun is on Vyatipâta, the Moon is above the line of equator and is situated in the Yugântara position The Pûrṇamâsa and Vyatipâta then see each other The Sun, Moon and the Pratipadâ tithis remain, then, in this state Endless merits result if salutation be done to the Sun at this time. This period is known as the sixth Satkriyâ kâla. (It is known as the 6th period.)—34-37.