Verse 28

क्रममाणो बलेनात्र वञ्चयित्वा बलिं हरिः ।बबन्ध पातालतले भूगेह इह वानरम्

In plain words

Hari, striding forth there by his own strength, having deceived Bali, bound him fast in the depths of Pātāla -- in an earthen den here, as a monkey is caught.