The Prophet ﷺ's Vision of the Land of Emigration

After the Second Covenant of Aqaba, the Prophet ﷺ announced to the Muslims that Allah had shown him, in a dream, the land they would emigrate to: a land of date palms between two volcanic plains. He was at first uncertain which city was meant, and speculated it might be Khaybar, or a land in Yemen, since both had large numbers of date palms, but neither has volcanic mountains around it as Yathrib does. He was then told clearly that it was Yathrib, and gave the Muslims permission to emigrate. They began emigrating in secret, by ones and twos, since the Quraysh would not have allowed it openly.