<human>: I had a traveling couple ask me to be their witness for their marriage ceremony. We made small talk while the paperwork went through and I took pictures during the ceremony. At the end I wished them well and they gave me what I thought was a card. It's a tradition they told me. But when I finally got to work today I noticed it was an envelope with quite a bit of cash in it. I feel really bad now. I don't know if it was rude to take the gift so quickly or even take it at all. Is this a typical tradition? Any insight would be great!

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<bot>: I was a random wedding witness, unknowingly got cash as a present, don't know if it was rude to accept it