岐伯答曰：天周二十八宿，宿三十六分，人氣行一周千八分，日行二十八宿。人經脉上下左右前後二十八脉，周身十六丈二尺，以應二十八宿，漏水下百刻，以分晝夜。故人一呼，脉再動，氣行三寸；一吸，脉亦再動，氣行三寸。呼吸，定息，氣行六寸；十息，氣行六尺，日行二分；
岐伯答曰：天周二十八宿，宿三十六分，人气行一周千八分，日行二十八宿。人经脉上下左右前后二十八脉，周身十六丈二尺，以应二十八宿，漏水下百刻，以分昼夜。故人一呼，脉再动，气行三寸；一吸，脉亦再动，气行三寸。呼吸，定息，气行六寸；十息，气行六尺，日行二分；
Qí Bó dá yuē: tiān zhōu èr shí bā sù, sù sān shí liù fēn, rén qì xíng yī zhōu qiān bā fēn, rì xíng èr shí bā sù. rén jīng mài shàng xià zuǒ yòu qián hòu èr shí bā mài, zhōu shēn shí liù zhàng èr chǐ, yǐ yīng èr shí bā sù, lòu shuǐ xià bǎi kè, yǐ fēn zhòu yè. gù rén yī hū, mài zài dòng, qì xíng sān cùn; yī xī, mài yì zài dòng, qì xíng sān cùn. hū xī, dìng xī, qì xíng liù cùn; shí xī, qì xíng liù chǐ, rì xíng èr fēn;
Qi Bo replied: Heaven circles through twenty-eight mansions, each of thirty-six fen, and a man’s qi travels one circuit in one thousand and eight fen, while the sun moves through the twenty-eight mansions. The channels of man, above and below, left and right, front and back, are twenty-eight vessels, and around the body they measure sixteen zhang and two chi, answering to the twenty-eight mansions. The clepsydra drops a hundred marks, dividing day from night. Thus with one exhalation the pulse beats twice and qi moves three cun; with one inhalation the pulse beats twice again and qi moves three cun. Exhalation and inhalation together make one breath, and qi moves six cun. In ten breaths qi moves six chi and the sun moves two fen.
「二十八宿」本篇4見，一在「天周」，一在「日行」，而「二十八脉」承之，天人同數，為全篇立算之根。
歧伯曰：歲有十二月，日有十二辰，子午爲經，夘酉爲緯。天周二十八宿，而一面七星，四七二十八星，房昴爲緯，虚張爲經。是故房至畢爲陽，昴至心爲陰。陽主晝，陰主夜。故衛氣之行，一日一夜，五十周於身。晝日行於陽二十五周，夜行於陰二十五周，周於五歲。
歧伯曰：岁有十二月，日有十二辰，子午为经，卯酉为纬。天周二十八宿，而一面七星，四七二十八星，房昴为纬，虚张为经。是故房至毕为阳，昴至心为阴。阳主昼，阴主夜。故卫气之行，一日一夜，五十周于身。昼日行于阳二十五周，夜行于阴二十五周，周于五岁。
Qí Bó yuē: suì yǒu shí èr yuè, rì yǒu shí èr chén, zǐ wǔ wéi jīng, mǎo yǒu wéi wěi. tiān zhōu èr shí bā sù, ér yī miàn qī xīng, sì qī èr shí bā xīng, fáng mǎo wéi wěi, xū zhāng wéi jīng. shì gù fáng zhì bì wéi yáng, mǎo zhì xīn wéi yīn. yáng zhǔ zhòu, yīn zhǔ yè. gù wèi qì zhī xíng, yī rì yī yè, wǔ shí zhōu yú shēn. zhòu rì xíng yú yáng èr shí wǔ zhōu, yè xíng yú yīn èr shí wǔ zhōu, zhōu yú wǔ suì.
Qi Bo said: The year has twelve months, the day twelve double-hours; zi and wu are the warp, mao and you the weft. Heaven encircles twenty-eight lodges, seven stars to a side, four sevens making twenty-eight; Fang and Mao are the weft, Xu and Zhang the warp. Hence from Fang to Bi is yang, from Mao to Xin is yin. Yang governs day, yin governs night. The movement of guarding qi is fifty circuits of the body in a day and a night: by day it moves twenty-five circuits in the yang, by night twenty-five circuits in the yin, going round the five viscera.
「二十八宿」衛氣行第2段見，義與本條相合，引全段為證。