On the dynamics of foliations in $\mathbb{P}^n$ tangent to Levi-flat   hypersurfaces
  Let $\mathcal{F}$ be a codimension one holomorphic foliation in $\mathbb{P}^n$, $n\geq 2$, leaving invariant a real-analytic Levi-flat hypersurface $M$ with regular part $M^{*}$. Then every leaf of $\mathcal{F}$ outside $\overline{M^{*}}$ accumulates in $\overline{M^{*}}$. 
Arturo Fern\'andez-P\'erez, Rog\'erio Mol and Rudy Rosas
math.CV