Verse 22

तमसौ पूजयामास पप्रच्छ च महामुनिम् ।संदेहदुर्द्रुमस्तम्भपरशुं सर्वकोविदम्

In plain words

The king honoured him, and questioned that great sage -- an axe laid to the trunk of the evil tree called doubt, one versed in all things.