। ॥
In plain words
He fills the belly at its due time and keeps a hard vow on the hillside. His heart is beyond the reach of the weapons of Kāma, whose banner is the fish, and he gives his toil to the work of awakening to the Self.
Word for word
Filling the belly at its due time, keeping a hard vow on the hillside; whose heart is beyond the reach of the weapons of the fish-bannered one, giving toil to the work of awakening to the Self.