(At-twur) 52 : 4
وَالْبَيْتِ الْمَعْمُورِ
And the inhabited house.
Just like the inhabitants of the earth have Ka’aba at Macach which is the Centre of the world, those who are in the seventh heaven has Baithul Ma’amoor as Ka’aba there. Lord Allah has taught through His Messenger that everyday 70, 000 Angels are entering in to Baithul Ma’amoor and they never come back from there. That is why it is told ‘inhabited house’. See explanation 17: 1.