YV 2.6e

Rudra let it go; it cleft the three citadels and drove the Asuras away from these worlds. The observance of the Upasads is for the driving away of foes. One should not offer another libation in front; if be were to offer another libation in front [2], he would make something else the beginning. He sprinkles clarified butter with the dipping- ladle to proclaim the sacrifice. He makes the offering after crossing over without coming back; verily he drives away his foes from these worlds so that they come not back. Then returning he offers the Upasad libation; verily having driven away his foes from these worlds and having conquered he mounts upon the world of his foes. Now the gods by the Upasads which they performed in the morning drove away the Asuras from the day, by the Upasads (performed) in the evening (they drove away the Asuras) from the night. In that both morning and evening Upasads [3] are performed, the sacrificer drives away his foes from day and night. The Yajyas used in the morning should be made Puronuvakyas at night, for variety. He performs three Upasads, these worlds are three; verily he delights these worlds; they together make six, the seasons are six; verily he delights the seasons. He performs twelve at an Ahina Soma sacrifice, the year consists of twelve months; verily he de lights the year. They make twenty-four [4], the half-months number twenty four; verily he delights the half-months. He should perform an awl-shaped intermediate consecration who wishes, 'May there be prosperity for me in this world', (that is) one to begin with, then two, then three, then four; this indeed is the awl-shaped intermediate consecration; verily there is prosperity for him in this world.