  Let $M$ be a complex manifold and $L$ be a line bundle over $M$ with a
Hermitian metric $h$ whose Chern form is a K\"ahler form $\omega$. Let $X
\subset M$ be a Lagrangian submanifold of $(M, \omega)$. When $X$ satisfies the
Bohr-Sommerfeld condition, we give an asymptotic estimate of the norm
$|f|_{h^k}$ on $X$ for $f \in H^0(M, L^k)$.
