Can anyone give me REAL PROOF that Muslims must pray in Arabic according to the Qur'an?

When I pray in Arabic my prayer feels empty because I don't understand what each individual word means. I felt so good and close to Allah in my prayer when I first reverted to Islam because I didn't know any of the Arabic phrases and I understood what I was saying completely. Please don't just say that it is ordered to pray in Arabic. Please show me in the Qur'an where it says I must pray in Arabic. I know Allah can understand every language and I am very confused about this. Thank you for your time. Jazaak Allah