The word(s) "quietly" appears 2 time(s) in 2 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) And stay quietly in your houses, and make not a dazzling display, like that of the former Times of Ignorance; and establish regular Prayer, and give regular Charity; and obey Allah and His Messenger. And Allah only wishes to remove all abomination from you, ye members of the Family, and to make you pure and spotless.

(2) Behold, We turned towards thee a company of Jinns (quietly) listening to the Qur'an: when they stood in the presence thereof, they said, "Listen in silence!" When the (reading) was finished, they returned to their people, to warn (them of their sins).