Stem اصْطَفَيْ has 3 unique word forms and appears 3 times in the Quran.

Word Translation Occurrences
ٱصۡطَفَيۡتُكَ have chosen you 2
ٱصۡطَفَيۡنَا We have chosen 2
ٱصۡطَفَيۡنَٰهُ We chose him 2