And mention when Moses son of Amram ‘Imrān said to his lad Joshua son of Nun Yūsha‘ bin Nūn who used to follow him around serve him and acquire knowledge from him ‘I will not give up I will not stop journeying until I have reached the juncture of the two seas — the point where the Byzantine sea and the Persian sea meet beyond the east — though I march on for ages’ for a very long time before reaching it if it be far.