The सुक्त praises इन्द्र for understanding divine appreciation and highlights his role with अग्नि , पूषन् , and the अश्विन्स् as givers of blessings [rv-3-57-1 ] rv • Book 3 . It speaks of the cosmic play involving rain and fertility [rv-3-57-3 ] rv • Book 3 . Heaven and earth are glorified through sacrificial rites [rv-3-57-4 ] rv • Book 3 with अग्नि appealing to other deities for protection and nourishment [rv-3-57-5 ] rv • Book 3 .