Five is mentioned in the Quran in these verses:
[3:125] Indeed, if you steadfastly persevere and maintain righteousness, then they attack you suddenly, your Lord will support you with five thousand angels, well trained.
[18:22] Some would say, “They were three; their dog being the fourth,” while others would say, “Five; the sixth being their dog,” as they guessed. Others said, “Seven,” and the eighth was their dog. Say, “My Lord is the best knower of their number.” Only a few knew the correct number. Therefore, do not argue with them; just go along with them. You need not consult anyone about this.
[58:7] Do you not realize that God knows everything in the heavens and everything on earth? No three people can conspire secretly without Him being their fourth, nor five without Him being the sixth, nor less than that, nor more, without Him being there with them wherever they may be. Then, on the Day of Resurrection, He will inform them of everything they had done. God is fully aware of all things.
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