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

(51) Remember how the Unbelievers plotted against thee, to keep thee in bonds, or slay thee, or get thee out (of thy home). They plot and plan, and Allah too plans; but the best of planners is Allah.

(52) If they refuse, be sure that Allah is your Protector - the best to protect and the best to help.

(53) "Because Allah will never change the grace which He hath bestowed on a people until they change what is in their (own) souls: and verily Allah is He Who heareth and knoweth (all things)."

(54) And an announcement from Allah and His Messenger, to the people (assembled) on the day of the Great Pilgrimage,- that Allah and His Messenger dissolve (treaty) obligations with the Pagans. If then, ye repent, it were best for you; but if ye turn away, know ye that ye cannot frustrate Allah. And proclaim a grievous penalty to those who reject Faith.

(55) Go ye forth, (whether equipped) lightly or heavily, and strive and struggle, with your goods and your persons, in the cause of Allah. That is best for you, if ye (but) knew.

(56) Among them are men who molest the Prophet and say, "He is (all) ear." Say, "He listens to what is best for you: he believes in Allah, has faith in the Believers, and is a Mercy to those of you who believe." But those who molest the Messenger will have a grievous penalty.

(57) They swear by Allah that they said nothing (evil), but indeed they uttered blasphemy, and they did it after accepting Islam; and they meditated a plot which they were unable to carry out: this revenge of theirs was (their) only return for the bounty with which Allah and His Messenger had enriched them! If they repent, it will be best for them; but if they turn back (to their evil ways), Allah will punish them with a grievous penalty in this life and in the Hereafter: They shall have none on earth to protect or help them.

(58) Amongst them are men who made a covenant with Allah, that if He bestowed on them of His bounty, they would give (largely) in charity, and be truly amongst those who are righteous.

(59) But when He did bestow of His bounty, they became covetous, and turned back (from their covenant), averse (from its fulfilment).

(60) Which then is best? - he that layeth his foundation on piety to Allah and His good pleasure? - or he that layeth his foundation on an undermined sand-cliff ready to crumble to pieces? and it doth crumble to pieces with him, into the fire of Hell. And Allah guideth not people that do wrong.