Verse 29

दृढभावनया त्यक्तपूर्वापरविचारणम् ।यदादानं पदार्थस्य वासना सा प्रकीर्तिता

In plain words

That taking-hold of an object which, through firm imagining, has abandoned all weighing of before and after — that is proclaimed to be vāsanā.