Matsya Purana 253.52

253.52

nagaragrāmadeśeṣu sarvatraivaṃ vivarjayet.
catuḥ śālaṃ triśāla़ñca dviśālaṃ caikaśālakam .
nāmatastān pravakṣyāmi svarūpeṇa dvijottamāḥ .. 253.51

At the commencement of a building if the owner feels an itching sensation on his body, it is to be inferred that there is a nail or some foreign matter under the ground And he should remove the nail from the portion of Vâstu in which corresponding part of his own body he feels itching—49 four classes are each 8 hands less respectively The length of all of these is 1¼ of their breadth—15-16