  Let $D\subset \mathbb{R}^{n}$ be a bounded convex domain and $F:D\rightarrow
D$ a $1$-Lipschitz mapping with respect to the Hilbert metric $d$ on $D$
satisfying condition $d(sx+(1-s)y,sz+(1-s)w)\leq \max \{d(x,z),d(y,w) \}$. We
show that if $F$ does not have fixed points, then the convex hull of the
accumulation points (in the norm topology) of the family $\{R_{\lambda
}\}_{\lambda >0}$ of resolvents of $F$ is a subset of $\partial D.$ As a
consequence, we show a Wolff-Denjoy type theorem for resolvents of nonexpansive
mappings acting on an ellipsoid $D$.
