SB 4.29.49
astirya darbhaih prag-agraih
kartsnyena ksiti-mandalam
stabdho brhad-vadhan mani
karma navaisi yat param
tat karma hari-tosam yat
sa vidya tan-matir yaya
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
My dear King, the entire world is covered with the sharp points of kusa grass, and on the strength of this you have become proud because you have killed various types of animals in sacrifices. Because of your foolishness, you do not know that devotional service is the only way one can please the Supreme Personality of Godhead. You cannot understand this fact. Your only activities should be those that can please the Personality of Godhead. Our education should be such that we can become elevated to Krsna consciousness.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In this verse the great sage Narada Muni directly insults the King because he was engaged in performing sacrifices that entail the killing of a great number of animals. The King was thinking that he was great for having performed so many sacrifices, but the great sage Narada directly chastises him, informing him that his animal-killing only leads to his being puffed up with false prestige. Actually, anything that is done which does not lead to Krsna consciousness is a sinful activity, and any education that does not lead one to understand Krsna is false education. If Krsna consciousness is missing, one is simply engaged in false activities and false educational pursuits.