Krsna Is the Source of All Incarnations
Srimad Bhagavatam; Canto 1, Chapter 3, Text 24
By His Divine Grace A.C. Bhaktivedanta Swami Prabhupada
tataḥ kalau sampravṛtte
tataḥ—thereafter; kalau—the age of Kali; sampravṛtte—having ensued; sammohāya—for the purpose of deluding; sura—the theists; dviṣām—those who are envious; buddhaḥ—Lord Buddha; nāmnā—of the name; añjana-sutaḥ—the son of Añjana; kīkaṭeṣu—in the province of Gayā (Bihar);bhaviṣyati—will take place.
Then, in the beginning of Kali-yuga, the Lord will appear as Lord Buddha, the son of Añjana, in the province of Gayā, just for the purpose of deluding those who are envious of the faithful theist.
Lord Buddha, a powerful incarnation of the Personality of Godhead, appeared in the province of Gayā (Bihar) as the son of Añjana, and he preached his own conception of nonviolence and deprecated even the animal sacrifices sanctioned in the Vedas. At the time when Lord Buddha appeared, the people in general were atheistic and preferred animal flesh to anything else. On the plea of Vedic sacrifice, every place was practically turned into a slaughterhouse, and animal killing was indulged in unrestrictedly.
Lord Buddha preached nonviolence, taking pity on the poor animals. He preached that he did not believe in the tenets of the Vedas and stressed the adverse psychological effects incurred by animal killing. Less intelligent men of the age of Kali, who had no faith in God, followed his principle, and for the time being they were trained in moral discipline and nonviolence, the preliminary steps for proceeding further on the path of God realization. He deluded the atheists because such atheists who followed his principles did not believe in God, but they kept their absolute faith in Lord Buddha, who himself was the incarnation of God. Thus the faithless people were made to believe in God in the form of Lord Buddha. That was the mercy of Lord Buddha: he made the faithless faithful to him.