So they stayed in their Cave three hundred years, and (some) add nine (more)
Yahiya Emerick Translation:
(Some people say that the Companions of the Cave) stayed in their cave for three hundred years, and (others) add nine (more years to that figure).
Emerick, Yahiya. The Meaning of the Holy Qur’an in Today’s English (p. 391). Unknown. Kindle Edition.