Lord Vishnu appears in the sacrifice of Pṛthu Maharaja (Srimad Bhagavatam #58)

By stopping the performance of the last sacrifice and being content with the performance of 99 horse sacrifices, Pṛthu Maharaja attained the ultimate purpose of all sacrifices, that is to please the Supreme Personality of Godhead. Lord Vishnu personally appeared at the arena of sacrifice, even though the sacrifice had been stopped and there were no oblations being offered. This emphasizes that the ultimate purpose in all our activities should be to satisfy the Lord, and not to merely obtain a certain material objective. In fruitive performances, as well as in ordinary material activities, an incomplete performance does not yield results. Demigods reward the performers of fruitive sacrifice for correctly executing the rituals, and ordinary business transactions generate results only after concluded. One may bake a cake, but until it is delivered and paid for, one doesn't get any money for it. Service to the Lord, however, operates in a different dynamic. The Lord sees not just the effort, but the intention. One can thus advance even without completing an activity. In fact, one can advance even without starting it, as long as his intention is positive. Even though not completing his 100 sacrifices, Pṛthu Maharaja satisfied the Lord, and that's what counts. Get full access to Mysteries of the Vedas at www.ccdas.net/subscribe