Rostam Fights the Nahang in the Sea

From C1.4, Akvan Flings Rostam into the Sea. It illustrates C1.4.27–33:

C1.4.27
Defying all that Rostam spoke aloud,He hurled him toward the sea from out the cloud.
C1.4.28
He reached the water, and his blade came out;The nahang scattered, circling him in rout.
C1.4.29
He struck out with his feet and left hand free,While with his right he battled through the sea.
C1.4.30
He fought and swam and would not rest at all,And met each wave as heroes meet a wall.
C1.4.31
If valor could avert the fatal day,Time would not sweep great Rostam’s name away.
C1.4.32
But know that turning time is ever thus:At times it nourishes, then poisons us.
C1.4.33
He struggled bravely through the waters vast,And, landing, praised the Maker, danger passed.