《黄帝内经·灵枢·本输》
小肠的脉气运行，上合于手太阳经，出于少泽穴，少泽在手小指尖端的外侧，称之为井金；脉气由此流于前谷穴，前谷在手外侧小指本节前陷中，称之为荥；脉气由此注于后溪穴，后溪在手外侧小指本节后陷中，称之为输；脉气由此过于腕骨穴，腕骨穴在手外侧腕骨之前陷中，称之为原；脉气由此行于阳谷穴，阳谷在手外侧腕中，锐骨下陷中，称之为经；脉气由此入归于小海穴，小海在肘外侧大骨的外缘陷中，离肘尖半寸处，伸臂屈肘向头取之，称之为合，这就是手太阳小肠经所属的五输穴和原穴的情况。
小肠者，上合手太阳，出于少泽，少泽，小指之端也，为井金；溜于前谷，前谷，在手外廉本节前陷者中也，为荥；注于后溪，后溪者，在手外侧本节之后也，为俞；过于腕骨，腕骨，在手外侧腕骨之前，为原；行于阳谷，阳谷，在锐骨之下陷者中也，为经；入于小海，小海，在肘内大骨之外，去端半寸陷者中也，伸臂而得之，为合，手太阳经也。
The Qi of small intestine runs, intersects with hand Tai Yang meridian at the upper end, comes out from Shaoxe acupoint, and Shaoxe is on the outer side of the tip of little finger of hand, namely Jingjin; Qi runs from here to Qiangu acupoint, Qiangu is on the outer side of hand, at the sunken middle of the first joint of little finger, namely Rong; Qi gathers from here to Houxi acupoint, Houxi is on the outer side of hand, at the sunken middle of the posterior first joint of little finger, namely Shu; Qi runs from here to Wangu acupoint, Wangu acupoint is on the outer side of hand, at the sunken middle of hand bone, namely Yuan; Qi runs from here to Yanggu acupoint, Yanggu is located on the outer side of hand, at the sunken middle under the sharp bone, namely Jing; Qi enters and returns to Xiaohai acupoint, Xiaohai is on the outer side of elbow, at the sunken middle of the outer edge of big bone, which is 0.5 sun away from the tip of elbow, and is taken when the arm is stretched and the elbow is bent towards the head, namely He. This is the five Shu acupoints and original point of hand Tai Yang small intestine meridian.