On the nature of rivers it says in revelation, that these two rivers flow forth from the north, part from Albûrz and part from the Albûrz of Aûharmazd; one towards the west, that is the Arag, and one towards the east, that is the Vêh river.

After them eighteen rivers flowed forth from the same source, just as the remaining waters have flowed forth from them in great multitude; as they say that they flowed out so very fast, one from the other, as when a man recites one Ashem-vohû of a series (padîsâr). All of those, with the same water, are again mingled with these rivers, that is, the Arag river and Vêh river. 4. Both of them continually circulate through the two extremities of the earth, and pass into the sea; and all the regions feast owing to the discharge (zahâk) of both, which, after both arrive together at the wide-formed ocean, returns to the sources whence they flowed out; as it says in revelation, that just as the light comes in through Albûrz and goes out through Albûrz, the water also comes out through Albûrz and goes away through Albûrz. 5. This, too, it says, that the spirit of the Arag begged of Aûharmazd thus: 'O first omniscient creative power! from whom the Vêh river begged for the welfare that thou mightest grant, do thou then grant it in my quantity!' 6. The spirit of the Vêh river similarly begged of Aûharmazd for the Arag river; and on account of loving assistance, one towards the other, they flowed forth with equal strength, as before the coming of the destroyer they proceeded without rapids, and when the fiend shall be destroyed they will again be without rapids. 7. Of those eighteen principal rivers, distinct from the Arag river and Vêh river, and the other rivers which flow out from them, I will mention the more famous: the Arag river, the Vêh river, the Diglat river they call also again the Vêh river, the Frât river, the Dâîtîk river, the Dargâm river, the Zôndak river, the Harôî river, the Marv river, the Hêtûmand river, the Akhôshir river, the Nâvadâ river, the Zîsmand river, the Khvegand river, the Balkh river, the Mehrvâ river they call the Hendvâ river, the Spêd river, the Rad river which they call also the Koir, the Khvaraê river which they call also the Mesrgân, the Harhaz river, the Teremet river, the Khvanaîdis river, the Dâraga river, the Kâsîk river, the Sêd ('shining') river Pêdâ-meyan or Katru-meyan river of Mokarstân. 8. I will mention them also a second time: the Arag river is that of which it is said that it comes out from Albûrz in the land of Sûrâk, in which they call it also the Âmi; it passes on through the land of Spêtos, which they also call Mesr, and they call it there the river Niv. 9. The Vêh river passes on in the east, goes through the land of Sînd, and flows to the sea in Hindûstân, and they call it there the Mehrâ river. 10. The sources of the Frât river are from the frontier of Arûm, they feed upon it in Sûristân, and it flows to the Diglat river; and of this Frât it is that they produce irrigation over the land. 11. It is declared that Mânûskîhar excavated the sources, and cast back the water all to one place, as it says thus 'I reverence the Frât, full of fish, which Mânûskîhar excavated for the benefit of his own soul, and he seized the water and gave to drink,' 12. The Diglat river comes out from Salmân, and flows to the sea in Khûgîstân. 13. The Dâîtîk river is the river which comes out from Aîrân-vêg, and goes out through the hill-country; of all rivers the noxious creatures in it are most, as it says, that the Dâîtîk river is full of noxious creatures. 14. The Dargâm river is in Sûde. 15. The Zend river passes through the mountains of Pangistân, and flows away to the Haro river. 16. The Haro river flows out from the Apârsên range. 17. The Hêtûmand river is in Sagastân, and its sources are from the Apârsên range; this is distinct from that which Frâsîyâv conducted away. 18. The river Akhôshir is in Kûmîs. 19. The Zîsmand river, in the direction of Soghd, flows away towards the Khvegand river. 20. The Khvegand river goes on through the midst of Samarkand and Pargâna, and they call it also the river Ashârd. 21. The Marv river, a glorious river in the east, flows out from the Apârsên range. 22. The Balkh river comes out from the Apârsên mountain of Bâmîkân, and flows on to the Vêh river. 23. The Spêd river is in Âtarô-pâtakân; they say that Dahâk begged a favour here from Aharman and the demons. 24. The Tort river, which they call also the Koir, comes out from the sea of Gîklân, and flows to the sea of Vergân. 25. The Zahâvayi is the river which comes out from Âtarô-pâtakân, and flows to the sea in Pârs. 26. The sources of the Khvaraê river are from Spâhân; it passes on through Khûgîstân, flows forth to the Diglat river, and in Spâhân they call it the Mesrkân river. 27. The Harhaz river is in Taparîstân, and its sources are from Mount Dimâvand. 28. The Teremet river flows away to the Vêh river. 29. The Vendeses river is in that part of Pârs which they call Sagastân. 30. The Kâsak river comes out through a ravine (kâf) in the province of Tûs, and they call it there the Kasp river; moreover, the river, which is there the Vêh, they call the Kâsak; even in Sînd they call it the Kâsak. 31. The Pêdâk-mîyân, which is the river Katru-mîyân, is that which is in Kangdez. 32. The Dâraga river is in Aîrân-vêg, on the bank (bâr) of which was the dwelling of Pôrûshasp, the father of Zaratûst. 33. The other innumerable waters and rivers, springs and channels are one in origin with those; so in various districts and various places they call them by various names. 34. Regarding Frâsîyâv they say, that a thousand springs were conducted away by him into the sea Kyânsîh, suitable for horses, suitable for camels, suitable for oxen, suitable for asses, both great and small; and he conducted the spring Zarînmand (or golden source), which is the Hêtûmand river they say, into the same sea; and he conducted the seven navigable waters of the source of the Vakaêni river into the same sea, and made men settle there.