Keepयन्त्रस्थानामावृतीनां पूजनं सम्यगाचरेत् ।प्रतिवारमशक्तानां शुक्रवारो नियम्यते ॥ 10-18 ॥Word by word (9)In plain wordsProperly worship the successive enclosures and deities of the yantra. For one unable to perform the rite continually, Friday is prescribed as a regular sacred day.