In plain words
The poet, of the Lord: He who flung a calf to bring down the fruit of the low-bent wood-apple tree, and, taking a form not his own [the mendicant Vāmana], measured the earth and brought it beneath his feet: he makes those flourish who bow at his feet, receive his grace and thrive, each in the way that befits them [in wealth, in the self's own bliss, or in reaching him], wishing to thrive ever more.