一字金輪佛頂 [ekākṣara-uṣṇīṣacakra] ~ 步嚕唵（भ्रूं [bhrūṃ]）

一字金輪佛頂 （梵名：एकाक्षर उष्णीषचक्र [ekākṣara-uṣṇīṣacakra]）為佛頂尊之一。一字金輪佛頂是入於甚深三昧禪定境界的如來所宣說一字真言「步嚕唵」（भ्रूं [bhrūṃ]）之神格化。

一字金輪佛頂的「一字」是指以梵字「步嚕唵」（भ्रूं [bhrūṃ]）一字為真言。金輪則指轉輪聖王中最為尊貴、優越的金輪聖王，以此來比喻此佛頂尊有著如金輪聖王般的無比威神、殊勝。因此，以一字金輪佛頂為主尊的一字金輪曼荼羅中、往往也會繪製上伴隨轉輪聖王一同出現於世間的輪王七寶（金輪寶、摩尼寶、玉女寶、馬寶、象寶、主藏臣寶、主兵臣寶）。

根據不同的經典、一字金輪佛頂有著如來造形的釋迦金輪、以及天人菩薩造型的大日金輪兩種不同的姿態。

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Link: https://books.google.com.sg/books?id=f5SCCwAAQBAJ&pg=PA297&lpg=PA297&dq=ek%C4%81k%E1%B9%A3ara-u%E1%B9%A3%E1%B9%87%C4%AB%E1%B9%A3acakra&source=bl&ots=pdLtkpxNb1&sig=Bq_YjUdPAbTZ9wlI-8hWqbN7VvM&hl=en&sa=X&ved=0ahUKEwiQo5KR3MHUAhUGRY8KHUARCP0Q6AEIIjAA#v=onepage&q=ek%C4%81k%E1%B9%A3ara-u%E1%B9%A3%E1%B9%87%C4%AB%E1%B9%A3acakra&f=false

Dharma Question
Venerable Lama Lotuschef,
I come from another Vajrayana lineage not from True Buddha school but I see you are an important Lama in True Buddha school.
I once had read an interesting sutra or dharma talk of Living Buddha Sheng Yen Lu about the one syllable golden wheel mantra which goes like ong bulong hung.
I've tried many times to find it again on google but didnt succeed.
Is it possible that you can easily tell me where to go or have the text or web address?
I so much wish I could find it again.
Many thanks in advance,
N G
Athens
Greece

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Dear N,
I am not an important lama in TBS!
The mantra you are looking for is 唵步噜唵 Om Bhrum and GM Lu taught it as 唵部林 Om bu lin
We use this at the end of each cultivation session for Completion, so that may all be auspicious and perfectly complete (rounded perfection 圆满).
I also forwarded relevant images to you of the Seed syllable of Om Bhrum

GM Lu gave the transmission of this mantra in Australia Melbourne's Yen San temple, in October 2010.

Please remember that in Tantrayana, one needs transmission empowerment from one's chosen lineage guru before practicing any sadhana of yidam of choice.
Please do so before you use this mantra.

http://www.fo9.org/fo9/a/fuzhouzhenyan/2013/0507/26_60.html#fo6

　一字轮王咒：唵部林 或者 曩莫三满多没驮南 唵步噜唵 (namah samanta budhanam om bhrum)

With Metta
Om Guru Lian Sheng Siddhi Hom
Lama Lotuschef