Verse 84

देशान्तरानुभवनं प्राणो वेत्ति हृदि स्थितम् ।स्पन्दवेदनतो यत्तन्मन इत्यभिधीयते

In plain words

Prāṇa knows the experiencing of other places as present in the heart; and that which knows through the sensing of spanda is what is called 'mind.'