The word(s) "grieve" appears 36 time(s) in 36 verse(s) in Quran in Muhammad Pickthal translation.

(11) O Messenger! Let not them grieve thee who vie one with another in the race to disbelief, of such as say with their mouths: "We believe," but their hearts believe not, and of the Jews: listeners for the sake of falsehood, listeners on behalf of other folk who come not unto thee, changing words from their context and saying: If this be given unto you, receive it, but if this be not given unto you, then beware! He whom Allah doometh unto sin, thou (by thine efforts) wilt avail him naught against Allah. Those are they for whom the Will of Allah is that He cleanse not their hearts. Theirs in the world will be ignominy, and in the Hereafter an awful doom;

(12) Say O People of the Scripture! Ye have naught (of guidance) till ye observe the Torah and the Gospel and that which was revealed unto you from your Lord. That which is revealed unto thee (Muhammad) from thy Lord is certain to increase the contumacy and disbelief of many of them. But grieve not for the disbelieving folk.

(13) Lo! those who believe, and those who are Jews, and Sabaeans, and Christians - Whosoever believeth in Allah and the Last Day and doeth right - there shall no fear come upon them neither shall they grieve.

(14) We know well how their talk grieveth thee, though in truth they deny not thee (Muhammad) but evil-doers flout the revelations of Allah.

(15) We send not the messengers save as bearers of good news and warners. Whoso believeth and doeth right, there shall no fear come upon them neither shall they grieve.

(16) O Children of Adam! When messengers of your own come unto you who narrate unto you My revelations, then whosoever refraineth from evil and amendeth - there shall no fear come upon them neither shall they grieve.

(17) Are these they of whom ye swore that Allah would not show them mercy? (Unto them it hath been said): Enter the Garden. No fear shall come upon you nor is it ye who will grieve.

(18) And when Moses returned unto his people, angry and grieved, he said: Evil is that (course) which ye took after I had left you. Would ye hasten on the judgment of your Lord? And he cast down the tablets, and he seized his brother by the head, dragging him toward him. He said: Son of my mother! Lo! the folk did judge me weak and almost killed me. Oh, make not mine enemies to triumph over me and place me not among the evil-doers.

(19) If ye help him not, still Allah helped him when those who disbelieve drove him forth, the second of two; when they two were in the cave, when he said unto his comrade: grieve not. Lo! Allah is with us. Then Allah caused His peace of reassurance to descend upon him and supported him with hosts ye cannot see, and made the word of those who disbelieved the nethermost, while Allah's Word it was that became the uppermost. Allah is Mighty, Wise.

(20) Lo! verily the friends of Allah are (those) on whom fear (cometh) not, nor do they grieve?