The word(s) "weaken" appears 6 time(s) in 6 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) And how many a prophet has fought with whom were many worshippers of the Lord; so they did not become weak-hearted on account of what befell them in Allah's way, nor did they weaken, nor did they abase themselves; and Allah loves the patient.

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

(3) So go about in the land for four months and know that you cannot weaken Allah and that Allah will bring disgrace to the unbelievers.

(4) And an announcement from Allah and His Apostle to the people on the day of the greater pilgrimage that Allah and His Apostle are free from liability to the idolaters; therefore if you repent, it will be better for you, and if you turn back, then know that you will not weaken Allah; and announce painful punishment to those who disbelieve.

(5) He said: My Lord! surely my bones are weakened and my head flares with hoariness, and, my Lord! I have never been unsuccessful in my prayer to Thee:

(6) 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.