Still can't find it elsewhere but maybe that's because it just happened. If so, it should be all over the place later and should be used in attack ads.

Here's a link to the full speech, but the comment is delivered like a joke. Joking about soldiers' deaths and sexual assault is appalling. Comparing a televised debate to combat is narcissistic, as Trump has no idea what combat is like. Sounds like a made-up story. Has any general come forward to claim their role? If an acting General made such a comment, they would surely lose the confidence of those serving in the military and many civilians as well.

At minute 17 in an 80 minute speech.
BREAKING NEWS: Trump Rails Against 'Biden Dictatorship' At New York Young Republicans Gala, December 10, 2023
Trump said "a general who's a fantastic general actually said to me sir I've been on the battlefield men have gone down on my left and on my right I stood on Hills where soldiers were killed but I believe the bravest thing I've ever seen was the night you went onto that stage with Hillary Clinton after what happened and then that woman asked you the first question about it and I said locker room talk"
YouTube: BREAKING NEWS: Trump Rails Against 'Biden Dictatorship' At New York Young Republicans Gala (Forbes Breaking News)