The word(s) "weak" appears 42 time(s) in 39 verse(s) in Quran in Muhammad Habib Shakir translation.

(31) O people! a parable is set forth, therefore listen to it: surely those whom you call upon besides Allah cannot create fly, though they should all gather for it, and should the fly snatch away anything from them, they could not take it back from it; weak are the invoker and the invoked.

(32) Surely Firon exalted himself in the land and made its people into parties, weakening one party from among them; he slaughtered their sons and let their women live; surely he was one of the mischiefmakers.

(33) And We desired to bestow a favor upon those who were deemed weak in the land, and to make them the Imams, and to make them the heirs,

(34) Allah is He Who created you from a state of weakness then He gave strength after weakness, then ordained weakness and hoary hair after strength; He creates what He pleases, and He is the Knowing, the Powerful.

(35) And those who disbelieve say: By no means will we believe in this Quran, nor in that which is before it; and could you see when the unjust shall be made to stand before their Lord, bandying words one with another! Those who were reckoned weak shall say to those who were proud: Had it not been for you we would certainly have been believers.

(36) Those who were proud shall say to those who were deemed weak: Did we turn you away from the guidance after it had come to you? Nay, you (yourselves) were guilty

(37) And those who were deemed weak shall say to those who were proud. Nay, (it was) planning by night and day when you told us to disbelieve in Allah and to set up likes with Him. And they shall conceal regret when they shall see the punishment; and We will put shackles on the necks of those who disbelieved; they shall not be requited but what they did.

(38) And when they shall contend one with another in the fire, then the weak shall say to those who were proud: Surely we were your followers; will you then avert from us a portion of the fire?

(39) Until when they see what they are threatened with, then shall they know who is weaker in helpers and fewer in number.