The word(s) "firm" appears 59 time(s) in 56 verse(s) in Quran in Muhammad Pickthal translation.

(41) Whosoever surrendereth his purpose to Allah while doing good, he verily hath grasped the firm hand-hold. Unto Allah belongeth the sequel of all things.

(42) And when they became steadfast and believed firmly in Our revelations, We appointed from among them leaders who guided by Our command.

(43) And when the true believers saw the clans, they said: This is that which Allah and His messenger promised us. Allah and His messenger are true. It did but confirm them in their faith and resignation.

(44) As for that which We inspire in thee of the Scripture, it is the Truth confirming that which was (revealed) before it. Lo! Allah is indeed Observer, Seer of His slaves.

(45) Nay, but he brought the Truth, and he confirmed those sent (before him).

(46) The folk of Noah before them denied (their messenger) and (so did the tribe of) A'ad, and Pharaoh firmly planted,

(47) He placed therein firm hills rising above it, and blessed it and measured therein its sustenance in four Days, alike for (all) who ask;

(48) When before it there was the Scripture of Moses, an example and a mercy; and this is a confirming Scripture in the Arabic language, that it may warn those who do wrong and bring good tidings for the righteous.

(49) They said: O our people! Lo! we have heard a scripture which hath been revealed after Moses, confirming that which was before it, guiding unto the truth and a right road.

(50) O ye who believe! If ye help Allah, He will help you and will make your foothold firm.