Barelwi Flags and Marches

AsSalaamu Alaykum.
Unfortunately I have to bear with much of the Bida'h performed by the Barelwi and before I commit myself to believing firmly that something is wrong, I would like to get clarity on it.

I heard in A barelwi talk that the evidence for bringing out flags on the day our Prophet was born, the angels came down with flags and placed them in 3 different locations, "Three flags I saw them bring down from Heaven: one they planted in the ground in the east, one in the west and one right atop the Kaba." Allegedly narrated by the mother of the Prophet

JazakAllahu Khairan

Assalamu ‘alaykum wa rahmatullahi wa barakatuh

We are unable to locate this Hadith in any authentic Hadith book.
One should be cautious and abstain from quoting a Hadith (like the one in question) when the Hadith is untraceable in any original Hadith source, until its authenticity can be verified.

And Allah Ta'ala Knows best

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