The word(s) "expound" appears 21 time(s) in 20 verse(s) in Quran in Muhammad Pickthal translation.

(11) The similitude of the life of the world is only as water which We send down from the sky, then the earth's growth of that which men and cattle eat mingleth with it till, when the earth hath taken on her ornaments and is embellished, and her people deem that they are masters of her, Our commandment cometh by night or by day and We make it as reaped corn as if it had not flourished yesterday. Thus do we expound the revelations for people who reflect.

(12) Alif. Lam. Ra. (This is) a Scripture the revelations whereof are perfected and then expounded. (It cometh) from One Wise, Informed,

(13) And the king said: Lo! I saw in a dream seven fat kine which seven lean were eating, and seven green ears of corn and other (seven) dry. O notables! expound for me my vision, if ye can interpret dreams.

(14) (And when he came to Joseph in the prison, he exclaimed): Joseph! O thou truthful one! expound for us the seven fat kine which seven lean were eating and the seven green ears of corn and other (seven) dry, that I may return unto the people, so that they may know.

(15) And they assign unto Allah that which they (themselves) dislike, and their tongues expound the lie that the better portion will be theirs. Assuredly theirs will be the Fire, and they will be abandoned.

(16) And We appoint the night and the day two portents. Then We make dark the portent of the night, and We make the portent of the day sight-giving, that ye may seek bounty from your Lord, and that ye may know the computation of the years, and the reckoning; and everything have We expounded with a clear expounding.

(17) And He expoundeth unto you the revelations. Allah is Knower, Wise.

(18) And thou (Muhammad) wast not on the western side (of the Mount) when We expounded unto Moses the commandment, and thou wast not among those present;

(19) A Scripture whereof the verses are expounded, a Lecture in Arabic for people who have knowledge,

(20) And if We had appointed it a Lecture in a foreign tongue they would assuredly have said: If only its verses were expounded (so that we might understand)? What! A foreign tongue and an Arab? - Say unto them (O Muhammad): For those who believe it is a guidance and a healing; and as for those who disbelieve, there is a deafness in their ears, and it is blindness for them. Such are called to from afar.