Oh, cool! I've never heard any mention of Dharma Protectors before in Chan/Zen. But that definitely proves it. I wonder if the CTTB people actually recite those prayers...
Ch'an is part of the vast Chinese Mahayana Tradition, of which CTTB, in the lineage of Guiyang/Weiyang School of Ch'an belongs to and of course they do recite it as it is part of the Chinese Mahayana morning/evening liturgies and it's all in their chanting CDs/handbook as well. I have been following their local chapter in my country since 1998. Below are samples from my worn out copy of their chanting book...see sample pic below
Wei Tuo/Skanda Bodhisattva is honored in the liturgical Chinese Mahayana Morning Office where towards the ending of the morning chants, his name and title are chanted thrice with Dharani of Sri Devi (From Golden Light Sutra) and ends with a short praise. E.g here is from their translation:
Namo Dharma Guardian Wei Tuo Venerated Deva Bodhisattva (Recited thrice)
Dharani of Sri Devi (recited thrice with handbell ringing - refer here
)Sung Praise to Skanda:
Wei Tuo, Master Warrior of the Devas,
Vast and Deep Your Mighty Vows,
To Cherish and Guard the Buddha's Teaching,
Your Vajra Sword Can Quell the Demon Armies,
Merit, Virtue All Beyond Compare,
Now we pray You will be Guardian of our Minds,
Namo Universal Eye Bodhisattva Mahasattva!
Maha Prajna Paramita!
He is commemorated on every 3rd Day of the Sixth Chinese Lunar Month.
Jie Lan/Sangharama Bodhisattva is honored in the liturgical Chinese Mahayana Evening Office where towards the ending of the evening chants, his name and title are chanted thrice with the Great Compassion Dharani and ends with a short praise. In CTTB, this part is not utilised in the evening liturgy but on the Upavasatha Days of the New/Full Moon Days during the meal offering ceremony. E.g here is from their translation:
Homage to the Holy Assembly of Temple Guarding Bodhisattvas (recited thrice)
Great Compassion Dharani (recited once - refer here
)Sung Praise to Jie Lan
Lord Jie Lan,
With Awesome Powers, Brings harmony to the Temple,
Respectfully He receives the Buddha's Commands,
And with sincerity protects and upholds the City of the Dharma King,
He acts as a barricade and sentry,
So that the Way Place is forever peaceful
Homage to the Bodhisattva Mahasattva Who Protects the Dharma Treasury
Maha Prajna Paramita!
He is commemorated on the 13th Day of the 5th Chinese Lunar Month.