It’s “Actual Physical Violence” from Chicago P.D..

That’s the episode associated with Hank Voight being involved in the palm- stabbing moment you’re describing, and it’s listed as a 2015 episode.

Quick note

If you meant a different scene where Voight is stabbed or threatened in a similar way, Homecoming is another nearby episode people often confuse with violent Voight moments, but the palm-stab match is “Actual Physical Violence.”