Verse 23

जन्मान्तरशताभ्यस्ता राम संसारसंस्थितिः ।सा चिराभ्यासयोगेन विना न क्षीयते क्वचित्

In plain words

Rāma, the fixed persistence of saṃsāra has been practiced through hundreds of other births; without the yoga of long practice, it is never worn away.