I got a job through employee internal referral, do I need to gift that employee something as a thank you?

An employee of the firm I got a job with told me about the job opportunity that I interviewed for, got the offer and accepted. As a thank you, should I get that employee a present? If yes, would a bottle of Champagne be appropriate? What do people usually do? I don’t want to be an ungrateful brat, but also don’t know if it’s custom to gift something as a gesture. How much to spend, etc.

Any advice is appreciated.

Edit: in case this makes any difference, as suggested by a comment below, I am in America. This is my second real professional adult job and had never been in this situation before so don’t really know what is customary. Thank you!!

usa jobs
usa jobs resume
usa hotel jobs
usajobs
usa jobs federal government
usa job in ksa
usa jobs
usa jobs login
usa jobs gov
usajobs.gov
www.usajobs.gov
usajobs.com
usajobs
usajobs.gov official