Our external enemies are using any arguments to undermine us from within [...] Thus, actions splitting our unity is a betrayal of our people, our combat brothers who fight now at the frontline. It's a dagger in the back of our country and our people.
Source, in full
Speech delivered on Russian television (24 June 2023) on the rebellion led by Yevgeny Prigozhin and the Wagner Group, as cited in "Putin vows to brutally punish 'traitor' Prigozhin and his Wagner mercenaries" The Telegraph (24 June 2023)
Notes from Wikiquote
In some reports, "dagger in the back" was rendered as "stab in the back".