The word(s) "brink" appears 2 time(s) in 2 verse(s) in Quran in Mohsin Khan translation.

(1) And hold fast, all of you together, to the Rope of Allah (i.e. this Qur'an), and be not divided among yourselves , and remember Allah's Favour on you, for you were enemies one to another but He joined your hearts together, so that, by His Grace, you became brethren (in Islamic Faith), and you were on the brink of a pit of Fire, and He saved you from it. Thus Allah makes His Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.,) clear to you, that you may be guided.

(2) Is it then he who laid the foundation of his building on piety to Allah and His Good Pleasure better, or he who laid the foundation of his building on the brink of an undetermined precipice ready to crumble down, so that it crumbled to pieces with him into the Fire of Hell. And Allah guides not the people who are the Zalimun (cruel, violent, proud, polytheist and wrong-doer).