Wearing a hat (not necessarily black) or covering the head with a talis by davenen is a mesoroh as I pointed out from the SA as it says chovash kovah yeshuah berosho. It also says in the Midrash Yalkut Simoni Ki SIso Remez 398, nisatef HKBH kashliach tzibur. We see that HKBH covers His head kavayochel.
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