Midrasz do Królów I 8:44

Our Rabbis taught: "A blind man or one who cannot determine the direction, let him direct his heart towards his Heavenly Father; for it is said (I Kings 8, 44.) They will pray unto the Lord. If he is outside of Palestine let him direct his heart toward Palestine, for it is said (Ib. 48.) They will pray unto Thee in the direction of their land. If he stand in Palestine let him direct his heart towards Jerusalem, for it is said (Ib. ib. 44.) They will pray unto the Lord in the direction of the city which thou hast chosen. If he stand in Jerusalem then let him direct his heart towards the Temple, for it is said (Ib. ib. 33.) And they will pray and praise unto this house. If he stand in the Temple then let him direct his heart towards the Holy of Holies; for it is said (Ib. ib. 30.) And they will pray towards this place. If he stand in the Holy of Holies let him direct his heart towards the Kaporeth. If he stand behind the cover of the ark, let him consider it as if he were standing in front of the Kaporeth. Hence, if one is in the east, he should face towards west; in the west, he should face towards east; in the south, he should face towards the north; in the north, he should face towards the south. It is thus found that all Israel directs its heart towards one place [towards the Holy of Holies]." Where is the Biblical passage [to refer to this]? Thy neck is like the tower of David built on terraces (Songs 4, 4), i.e., a mound towards which all turn."