Form 1قَفَا أَثَرَهُ2 senses · 1 main
Core sense — he followed his track, he tracked himgenerated
He followed his track, or footsteps; he tracked him.
See قَصَّ أَثَرَهُ, which has the same meaning, for a better explanation. See also قَفَوَتُ أَثَرَهُ.
And pursue not that of which thou hast no knowledge; for every act of hearing, or of seeing or of (feeling in) the heart will be enquired into (on the Day of Reckoning).
Occurrences of this form in the Qur’ān, not Lane’s choice of verse. They show the word in use; they do not say which sense above applies. Where more occur than are shown, the shortest āyāt are chosen.