Verse 129

यत्र यत्र मनो याति तत् तत् तेनैव तत्क्षणम् ।परित्यज्यानवस्थित्या निस्तरङ्गस् ततो भवेत्

In plain words

Wherever goes, let go of that, whatever it is, through itself in that very instant; by not staying anywhere, you then become waveless.