The word(s) "boast" appears 8 time(s) in 8 verse(s) in Quran in Mohsin Khan translation.

(1) Worship Allah and join none with Him (in worship); and do good to parents, kinsfolk, orphans, Al-Masakin (the poor), the neighbour who is near of kin, the neighbour who is a stranger, the companion by your side, the wayfarer (you meet), and those (slaves) whom your right hands possess. Verily, Allah does not like such as are proud and boastful.

(2) And because of their saying (in boast), "We killed Messiah 'Îsa (Jesus), son of Maryam (Mary), the Messenger of Allah," - but they killed him not, nor crucified him, but it appeared so to them [the resemblance of 'Îsa (Jesus) was put over another man (and they killed that man)], and those who differ therein are full of doubts. They have no (certain) knowledge, they follow nothing but conjecture. For surely; they killed him not [i.e. 'Îsa (Jesus), son of Maryam (Mary) عليهما السلام]:

(3) And be not like those who come out of their homes boastfully and to be seen of men, and hinder (men) from the Path of Allah; and Allah is Muhitun (encircling and thoroughly comprehending) all that they do.

(4) But if We let him taste good (favour) after evil (poverty and harm) has touched him, he is sure to say: "Ills have departed from me." Surely, he is exultant, and boastful (ungrateful to Allah).

(5) "And turn not your face away from men with pride, nor walk in insolence through the earth. Verily, Allah likes not any arrogant boaster.

(6) Know that the life of this world is only play and amusement, pomp and mutual boasting among you, and rivalry in respect of wealth and children. (It is) as the likeness of vegetation after rain, thereof the growth is pleasing to the tiller; afterwards it dries up and you see it turning yellow; then it becomes straw. But in the Hereafter (there is) a severe torment (for the disbelievers - evil-doers), and (there is) Forgiveness from Allah and (His) Good Pleasure (for the believers - good-doers). And the life of this world is only a deceiving enjoyment.

(7) In order that you may not grieve at the things that you fail to get, nor rejoice over that which has been given to you. And Allah likes not prideful boasters.

(8) He says (boastfully): "I have wasted wealth in abundance!"