“Lomasa said, ’At that very time, the mighty king, Vrihadyumna, of high fortune, who was the Yajamana of Raivya, commenced a sacrifice.  And the two sons of Raivya, Arvavasu and Paravasu, were engaged by that intelligent monarch, to assist him in the performance of the ceremony.  And, O son of Kunti, taking the permission of their father, they two went to the sacrifice, while Raivya with Paravasu’s wife remained in the hermitage.  And it came to pass that one day, desirous of seeing his wife, Paravasu returned home alone.  And he met his father in the wood, wrapped in the skin of a black antelope.  And the night was far advanced and dark; and Paravasu, blinded by drowsiness in that deep wood, mistook his father for a straggling deer.  And mistaking him for a deer, Paravasu, for the sake of personal safety, unintentionally killed his father.  Then, O son of Bharata, after performing the funeral rites (of his father), he returned to the sacrifice and there addressed his brother saying, “Thou wilt never be able to perform this task unassisted.  I again, have killed our father, mistaking him for a deer.  O brother, for me do thou observe a vow, prescribed in the case of killing a Brahmana.  O Muni, I shall be able to perform this work (sacrifice), without any assistant.”  Arvavasu said, “Do thou then thyself officiate at this sacrifice of the gifted Vrihadyumna; and for thee will I, bringing my senses under perfect control, observe the vow prescribed in the case of slaying a Brahmana."’

“Lomasa said, ’Having observed the vow relative to the killing of a Brahmana, the sage Arvavasu came back to the sacrifice.  Seeing his brother arrive, Paravasa, in accents choked with malice, addressed Vrihadyumna, saying, “O king, see that this slayer of a Brahmana enter not into thy sacrifice, nor look at it.  Even by a glance, the killer of a Brahmana can, without doubt, do thee harm.”  O lord of men, immediately on hearing this, the king ordered his attendants (to turn out Arvavasu).  O king, on being driven out by the king’s attendants, and repeatedly addressed by them—­“O slayer of a Brahmana”—­Arvavasu more than once cried, “It is not I that have killed a Brahmana.”  Nor did he own that he had observed the vow for his own sake.  He said that his brother had committed the sin, and that he had freed him therefrom.  Having said this in anger, and being reprimanded by the attendants, the Brahmana sage of austere penances, retired in silence into the woods.  There betaking himself to the severest penances, the great Brahmana sought the protection of the Sun.  Thereupon, the revelation teaching the mantra relative to the worship of the Sun, became manifest unto him and that eternal deity who obtaineth his share (of the sacrificial butter) first, appeared before him in an embodied form.’