  How passive galaxies form, and the physical mechanisms which prevent star
formation over long timescales, are some of the most outstanding questions in
understanding galaxy evolution. The properties of quiescent galaxies over
cosmic time provide crucial information to identify the quenching mechanisms.
Passive galaxies have been confirmed and studied out to $z\sim4$, but all of
these studies have been limited to massive systems (mostly with $\log{(M_{\rm
star}/M_{\odot})}>10.8$). Using James Webb Space Telescope (JWST) NIRISS grism
slitless spectroscopic data from the GLASS JWST ERS program, we present
spectroscopic confirmation of two quiescent galaxies at $z_{\rm
spec}=2.650^{+0.004}_{-0.006}$ and $z_{\rm spec}=2.433^{+0.032}_{-0.016}$
(3$\sigma$ errors) with stellar masses of $\log{(M_{\rm
star}/M_{\odot})}=10.53^{+0.18}_{-0.06}$ and $\log{(M_{\rm
star}/M_{\odot})}=9.93^{+0.06}_{-0.07}$ (corrected for magnification factors of
$\mu=2.0$ and $\mu=2.1$, respectively). The latter represents the first
spectroscopic confirmation of the existence of low-mass quiescent galaxies at
cosmic noon, showcasing the power of JWST to identify and characterize this
enigmatic population.
