Where is the next pentaquark state?

The LHCb Collaboration has observed two types of hidden-charm pentaquark states $P_{\psi }^N$ and $P_{\psi s}^{\mathrm{\Lambda }}$ since 2015. In this work, we predict two other types of hidden-charm pentaquark states $P_{\psi s}^{\mathrm{\Sigma }}(4367)$ and $P_{\psi ss}^N(4379)$ within the framework of heavy pentaquark chiral perturbation theory. We suggest the LHCb Collaboration to observe $P_{\psi ss}^N(4379{)}^{-}$ and $P_{\psi ss}^N(4379{)}^0$ with $J^P={\frac{1}{2}}^{-}$ in the $J\mathrm{/}\psi \mathrm{\Xi }$ spectrum through amplitude analyses of ${\mathrm{\Omega }}_b^{-}\to J\mathrm{/}\psi {\mathrm{\Xi }}^0{K}^{-}$ decays and $B^{-}\to J\mathrm{/}\psi {\mathrm{\Xi }}^{-}\bar{\mathrm{\Lambda }}$ decays.