Thus Rávaṇ’s foe resolved to trace The captive to her hiding-place Through airy pathways overhead Which heavenly minstrels visited. With straining nerve and eager brows, Like some strong husband of the cows, In ready might he stood prepared For the bold task his soul had dared.

In plain words: Hanuman, the monkey hero, decides to fly through the sky to find where Sita, Rama's captured wife, is being held by Ravan, the demon king. He stands ready and strong, like a mighty bull, for this brave task.