Verse 58

सबाह्याभ्यन्तरे शान्ते स्पन्दे तत्त्वविदां वर ।धातवः संस्थितिं देहे न त्यजन्ति कदाचन

In plain words

O best of the knowers of Truth, when spanda, both outward and inward, has come to rest, the dhātus never once forsake their settled place within the body.