प्राणानां प्राणनं स्पन्दस्तच्छान्तौ ते दृषत्समाः ।यतः स्थिता धारणया तेनानष्टास्य सा तनुः
In plain words
Spanda is the very breathing of the prāṇas; when that is stilled, they become like stone. Because that body remained fixed through dhāraṇā, it was, by that very fact, never destroyed.