Mil Hamdulillah seems like a mix of two different words from different languages. Mil word is from Urdu, that meaning Mulaqat or together, and Hamdulillah word is from Arabic, commonly used in Urdu as well, meaning Tamam tareefain Allah ke liye hain. But when combined as Mil Hamdulillah, it doesn't form a complete or meaningful phrase in either Urdu or Arabic. It seems like an incomplete part of a longer Wazifa. If you share the full Wazifa, I will be able to guide you more accurately.