Madhvaon Brahma Sūtra 4.2.20

Notwithstanding the statement, “ Dying during the Southern progress of the sun, he goes to Svarga and dying during the Northern progress he goes to Brah- man,” it is fit to admit that the wise may depart during the Southern progress, (too), of the sun. The following is stated in the Narayanadhyatma: "There are five hun- dred rays of the sun which are called the rays of the Southern progress; and there is the same number of the rays of the Northern progress. All of them are always in connection with the body of all beings. Those who are qualified to go to the spheres up to the Maharloka depart, following the rays of the Northern progress; and by the other rays, the other (souls) tb whom the destination is different. And these two sets of rays are here spoken of as the Northern and Southern rays; but there is no pecu- liarity wrought by time ; for in the case of the wise, the fruit is invariable (and necessarily assured). However if the time also be favourable, there may be some enhance- ment of the consequence in the case of some individuals; but in the case of some of the exalted souls, there is abso- lutely no difference caused by time.”