3:125
Yes, if you are patient and fear (Allah) and they come upon you [of] suddenly, [this] will reinforce you your Lord with five thousand[s] [of] [the] Angels [the ones] having marks.

18:22
They say, (they were) three, the forth of them their dog; and they say (they were) five the sixth of them their dog - guessing about the unseen; and they say, (they were) seven and the eight of them their dog. Say, "My Lord, knows best their number. None knows them except a few. So (do) not argue about them except (with) an argument obvious, and (do) not inquire about them among them (from) anyone."

58:7
Do not you see that Allah knows whatever (is) in the heavens and whatever (is) in the earth? Not there is any secret counsel (of) three but He (is) (the) fourth of them, and not five but He (is) (the) sixth of them, and not less than that and not more but He (is) with them wherever that they are. Then He will inform them of what they did (on the) Day (of) the Resurrection. Indeed, Allah of every thing (is) All-Knower.

8:41
And know that what you obtain (as) spoils of war of anything, then that, for Allah (is) one fifth of it and for the Messenger and for the near relatives, and the orphans and the needy and the wayfarer, if you believe in Allah, and (in) what We sent down to Our slave (on the) day (of) the criterion, (the) day (when) met the two forces. And Allah (is) on every thing All-Powerful.

70:4
Ascend the Angels and the Spirit to Him in a Day, [is] its measure (is) fifty thousand year(s).

29:14
And verily, We sent Nuh to his people, and he remained among them a thousand year(s), save fifty year(s), then seized them the flood, while they (were) wrongdoers.

24:9
And the fifth, that the wrath (of) Allah (be) upon her if he is of the truthful.

24:7
And the fifth that (the) curse (of) Allah (be) upon him if he is of the liars.