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Recent studies show that $D_{s0}^{\ast}(2317)$ and $D_{s1}(2460)$ containlarge molecular components. In this work, we employ the naive factorizationapproach to calculate the production rates of $D_{s0}^{\ast}(2317)$ and$D_{s1}(2460)$ as hadronic molecules in $B_{(s)}$ and $\Lambda_b(\Xi_b)$decays, where their decay constants are estimated in the effective Lagrangianapproach. With the so-obtained decay constants $f_{D_{s0}^{\ast}(2317)}$ and$f_{D_{s1}(2460)}$, we calculate the branching fractions of the $b$-mesondecays $B_{(s)}\to \bar{D}_{(s)}^{(*)}D_{s0}^*$ and $B_{(s)}\to\bar{D}_{(s)}^{(*)}D_{s1}$ and the $b$-baryon decays $\Lambda_b(\Xi_{b}) \to\Lambda_c(\Xi_{c}) D_{s0}^*$ and $\Lambda_b(\Xi_{b}) \to \Lambda_c(\Xi_c)D_{s1}$. Our results show that the production rates of $D_{s0}^{\ast}(2317)$and $D_{s1}(2460)$ in the $B_s$, $\Lambda_b$ and $\Xi_b$ decays are ratherlarge that future experiments could observe them. In particular, we demonstratethat one can extract the decay constants of hadronic molecules via the trianglemechanism because of the equivalence of the triangle mechanism to the treediagram established in calculating the decays $B \to\bar{D}^{(*)}D_{s0}^{\ast}(2317)$ and $B \to \bar{D}^{(*)}D_{s1}(2460)$.

Productions of $D^*_{s0}(2317)$ and $D_{s1}(2460)$ in $B_{(s)}$ and $\Lambda_b(\Xi_b)$ decays