大毘盧遮那成佛經疏 4.40

4.40

On the eve of the fifth day, one should again sequentially prepare all the rules, properly adorn one's body, visualise entering the station of the maṇḍala, make the invitations and establish the boundary (sīmābandha) completely, and then recite [the mantra of] the Vidyārāja Acala or Lord Trailokyavijaya, in accordance with the secret seal (mudrā), empowering this ground for a full one hundred and eight times. The ācārya said: "From the third day onward, every day at the three times of recitation, one always recites the mantra of Acala one hundred and eight times to empower the ground. Not only here, but it should be used in all places. Furthermore, from the first day through the third day, if there are hindrances, one should withdraw and cease. If the white sandalwood stations have already been painted, even if there are various demonic occurrences or disagreements between the two parties, one must diligently apply upāya and ensure its completion. The rest is as spoken in the Guhya [Sūtra]." Having recited the mantra of Acala on the fifth night, one should next, with the body of Mahāvairocana, recite the mantra for holding the ground and make the samaya-mudrā. That mantra says: