Nidbai

{{Short description|Uthra in Mandaeism}}

{{Infobox deity

| type = Mandaean

| name = Nidbai

| deity_of = Guardian of Piriawis

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| image = Zihrun Raza Kasia - Nidbai.jpg

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| caption = Nidbai in Zihrun Raza Kasia (DC 27)

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| abode = World of Light

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{{Mandaeism}}

In Mandaeism, Nidbai ({{langx|myz|ࡍࡉࡃࡁࡀࡉ}}) is an uthra (angel or guardian){{cite book|last=Buckley|first=Jorunn Jacobsen|title=The Mandaeans: ancient texts and modern people|publisher=Oxford University Press|publication-place=New York|year=2002|isbn=0-19-515385-5|oclc=65198443}}{{rp|8}} who serves as one of the two guardian spirits ({{Transliteration|myz|ʿutria naṭria}}) of Piriawis, the heavenly yardna (river) in the World of Light.{{cite thesis|url=https://discovery.ucl.ac.uk/id/eprint/1444088/|last=Aldihisi|first=Sabah|year=2008|title=The story of creation in the Mandaean holy book in the Ginza Rba|type=PhD|publisher=University College London}} In the Ginza Rabba and Qulasta, he is usually mentioned together with Shilmai.{{cite book |url=https://www.amazon.de/Ginza-Rabba-English-Translation-Drabsha/dp/B00A3GO458|last1=Al-Saadi |first1=Qais Mughashghash |last2=Al-Saadi |first2=Hamed Mughashghash |chapter=Glossary |title=Ginza Rabba: The Great Treasure. An equivalent translation of the Mandaean Holy Book |year=2019 |edition=2 |publisher=Drabsha}}{{cite book |url=https://livingwaterbooks.com.au/product/ginza-rba/ |last1=Gelbert |first1=Carlos |title=Ginza Rba |year=2011 |publisher=Living Water Books |location=Sydney |isbn=9780958034630}}