“The Messenger of Allah ﷺ took me to a place in the desert, near Makkah, where there was arid land surrounded by sand. The Messenger of Allah ﷺ said: ‘The Beast will emerge from this spot – span by a span. (i.e, the size of that spot).’” (Using translation from Ibn Mājah 4067)
ذَهَبَ بِي رَسُولُ اللهِ ﷺ إِلَى مَوْضِعٍ بِالْبَادِيَةِ قَرِيبًا مِنْ مَكَّةَ فَإِذَا أَرْضٌ يَابِسَةٌ حَوْلَهَا رَمْلٌ فَقَالَ رَسُولُ اللهِ ﷺ تَخْرُجُ الدَّابَّةُ مِنْ هَذَا الْمَوْضِعِ فَإِذَا فِتْرٌ فِي شِبْرٍ