The word(s) "highest" appears 16 time(s) in 16 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) "And preserve them from (all) ills; and any whom Thou dost preserve from ills that Day,- on them wilt Thou have bestowed Mercy indeed: and that will be truly (for them) the highest Achievement".

(12) That He may admit the men and women who believe, to Gardens beneath which rivers flow, to dwell therein for aye, and remove their ills from them;- and that is, in the sight of Allah, the highest achievement (for man),-

(13) While he was in the highest part of the horizon:

(14) One Day shalt thou see the believing men and the believing women- how their Light runs forward before them and by their right hands: (their greeting will be): "Good News for you this Day! Gardens beneath which flow rivers! to dwell therein for aye! This is indeed the highest Achievement!"

(15) Such is the Bounty of Allah, which He bestows on whom He will: and Allah is the Lord of the highest bounty.

(16) Your riches and your children may be but a trial: but in the Presence of Allah, is the highest, Reward.