In plain words
The poet, to the Lord: O you whose foot measured the earth [in three strides] and took it! You broke the white tusk of the elephant of fierce wrath [Kuvalayāpīḍa] and destroyed the enraged and mighty Kaṃsa; you drew out, with her milk, the life of the demoness [Pūtanā] who came in deceit. Are you not the radiant one, the first cause, whose colour is dark as kohl?