2 verses have
best
in Edition Clear Qur'an by Talal Itani / An-Najm (The Star)

53:30That is the extent of their knowledge. Your Lord knows best who has strayed from His path, and He knows best who has accepted guidance.

53:31To God belongs whatever is in the heavens and whatever is on earth. He will repay those who do evil according to their deeds, and recompense those who do good with the best.