《水经注·卷十三》
有敦水注入。敦水发源于西北少咸山南麓，往东流经参合县老城南。《地理风俗记》说：道人城以北五十里有参合乡，从前是县。
《地理志》曰：祁夷水出平舒县，北至桑乾入漯是也。
The Dun River flows into it. The Dun River originated from the southern foot of Shaoxian Mountain in the northwest and flows eastward through the old city of Sanhe County. The "Geographical Customs Records" says: 50 li north of Daoren City is Sanhe Township, which used to be a county.
<s>[INST] Kindly elucidate the central themes in this passage in English: 《地理志》曰：祁夷水出平舒县，北至桑乾入漯是也。 [/INST] The Dun River flows into it. The Dun River originated from the southern foot of Shaoxian Mountain in the northwest and flows eastward through the old city of Sanhe County. The "Geographical Customs Records" says: 50 li north of Daoren City is Sanhe Township, which used to be a county.</s>
Kindly elucidate the central themes in this passage in English: 《地理志》曰：祁夷水出平舒县，北至桑乾入漯是也。
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The Dun River flows into it. The Dun River originated from the southern foot of Shaoxian Mountain in the northwest and flows eastward through the old city of Sanhe County. The "Geographical Customs Records" says: 50 li north of Daoren City is Sanhe Township, which used to be a county.
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