The word(s) "best" appears 257 time(s) in 234 verse(s) in Quran in Abdullah Yusuf Ali translation.

(131) If they do wrangle with thee, say, "Allah knows best what it is ye are doing."

(132) And strive in His cause as ye ought to strive, (with sincerity and under discipline). He has chosen you, and has imposed no difficulties on you in religion; it is the cult of your father Abraham. It is He Who has named you Muslims, both before and in this (Revelation); that the Messenger may be a witness for you, and ye be witnesses for mankind! So establish regular Prayer, give regular Charity, and hold fast to Allah! He is your Protector - the best to protect and the best to help!

(133) Then We made the sperm into a clot of congealed blood; then of that clot We made a (foetus) lump; then we made out of that lump bones and clothed the bones with flesh; then we developed out of it another creature. So blessed be Allah, the best to create!

(134) And say: "O my Lord! enable me to disembark with thy blessing: for Thou art the best to enable (us) to disembark."

(135) And the chiefs of his people, who disbelieved and denied the Meeting in the Hereafter, and on whom We had bestowed the good things of this life, said: "He is no more than a man like yourselves: he eats of that of which ye eat, and drinks of what ye drink.

(136) Or is it that thou askest them for some recompense? But the recompense of thy Lord is best: He is the best of those who give sustenance.

(137) Repel evil with that which is best: We are well acquainted with the things they say.

(138) "A part of My servants there was, who used to pray 'our Lord! we believe; then do Thou forgive us, and have mercy upon us: For Thou art the best of those who show mercy!"

(139) So say: "O my Lord! grant Thou forgiveness and mercy for Thou art the best of those who show mercy!"

(140) Why did not the believers - men and women - when ye heard of the affair,- put the best construction on it in their own minds and say, "This (charge) is an obvious lie"?