Mayamatam 30.79

30.79

ṣaṭpaṅktivistṛtāyāmaṃ dvāratāraṃ vidhīyate
dvārasya pārśvayorvāsamekaikāṃśena yojitam

A width and length of six and ten [parts] is prescribed as the doorway width; / a chamber is joined on each of the two sides of the doorway by one part each;