"寧贈友邦,不與家奴." or 宁予於外盗, 不予於家贼. (We would rather give our state to "neighboring friends" (foreigners), not to our household slaves ̈(Han Chinese).)
Source, in full
The anti-Qing reformer Liang Qichao accused Gangyi of saying this after the failure of the 1898 Hundred Days Reform, not Cixi. This was never attributed to Cixi by any historian or person until anti-Qing Han nationalists started posting this on internet forums and attributing it to Cixi.