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

(11) Surely (as for) those whom the angels cause to die while they are unjust to their souls, they shall say: In what state were you? They shall say: We were weak in the earth. They shall say: Was not Allah's earth spacious, so that you should have migrated therein? So these it is whose abode is hell, and it is an evil resort

(12) Except the weak from among the men and the children who have not in their power the means nor can they find a way (to escape);

(13) And be not weak hearted in pursuit of the enemy; if you suffer pain, then surely they (too) suffer pain as you suffer pain, and you hope from Allah what they do not hope; and Allah is Knowing, Wise.

(14) And they ask you a decision about women. Say: Allah makes known to you His decision concerning them, and that which is recited to you in the Book concerning female orphans whom you do not give what is appointed for them while you desire to marry them, and concerning the weak among children, and that you should deal towards orphans with equity; and whatever good you do, Allah surely knows it.

(15) The chief of those who behaved proudly among his people said to those who were considered weak, to those who believed from among them: Do you know that Salih is sent by his Lord? They said: Surely we are believers in what he has been sent with

(16) And We made the people who were deemed weak to inherit the eastern lands and the western ones which We had blessed; and the good word of your Lord was fulfilled in the children of Israel because they bore up (sufferings) patiently; and We utterly destroyed what Firon and his people had wrought and what they built.

(17) And when Musa returned to his people, wrathful (and) in violent grief, he said: Evil is it that you have done after me; did you turn away from the bidding of your Lord? And he threw down the tablets and seized his brother by the head, dragging him towards him. He said: Son of my mother! surely the people reckoned me weak and had well-nigh slain me, therefore make not the enemies to rejoice over me and count me not among the unjust people.

(18) This, and that Allah is the weakener of the struggle of the unbelievers.

(19) And remember when you were few, deemed weak in the land, fearing lest people might carry you off by force, but He sheltered you and strengthened you with His aid and gave you of the good things that you may give thanks.

(20) When Allah showed them to you in your dream as few; and if He had shown them to you as many you would certainly have become weak-hearted and you would have disputed about the matter, but Allah saved (you); surely He is the Knower of what is in the breasts.