治禪病祕要法 2.22

2.22

"Furthermore, Śāriputra! If a practitioner enters the fire samādhi, flames blaze from joint to joint, and fire flares up in the large and small intestines simultaneously, burning and agitating the fire channels. Upon emerging from samādhi, he has a slight headache, his channels contract and twitch, his eyes become bloodshot, and his ears go deaf. Since illness has arisen from this, it must be cured quickly.