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

(11) When he had turned away from them and from those whom they worshipped besides Allah, We bestowed on him isaac and Jacob, and each one of them We made a prophet.

(12) And We bestowed on him isaac and, as an additional gift, (a grandson), Jacob, and We made righteous men of every one (of them).

(13) And We gave (Abraham) isaac and Jacob, and ordained among his progeny Prophethood and Revelation, and We granted him his reward in this life; and he was in the Hereafter (of the company) of the Righteous.

(14) And We gave him the good news of isaac - a prophet,- one of the Righteous.

(15) We blessed him and isaac: but of their progeny are (some) that do right, and (some) that obviously do wrong, to their own souls.

(16) And commemorate Our Servants Abraham, isaac, and Jacob, possessors of Power and Vision.