I read that too, but it is not widely known in any vedas\upanisada as far as I know
Om Namaste astu Bhagavan Vishveshvaraya Mahadevaya Triambakaya Tripurantakaya Trikalagni kalaya kalagnirudraya Neelakanthaya Mrutyunjayaya Sarveshvaraya Sadashivaya Shriman Mahadevaya Namah Om Namah Shivaye Om Om Namah Shivaye Om Om Namah Shivaye
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