The word(s) "seventy" appears 3 time(s) in 3 verse(s) in Quran in Muhammad Pickthal translation.

(1) And Moses chose of his people seventy men for Our appointed tryst and, when the trembling came on them, he said: My Lord! If Thou hadst willed Thou hadst destroyed them long before, and me with them. Wilt thou destroy us for that which the ignorant among us did? It is but Thy trial (of us). Thou sendest whom Thou wilt astray and guidest whom Thou wilt: Thou art our Protecting Friend, therefore forgive us and have mercy on us, Thou, the Best of all who show forgiveness.

(2) Ask forgiveness for them (O Muhammad), or ask not forgiveness for them; though thou ask forgiveness for them seventy times Allah will not forgive them. That is because they disbelieved in Allah and His messenger, and Allah guideth not wrongdoing folk.

(3) And then insert him in a chain whereof the length is seventy cubits.