The effect of the magnetic field on the onset of thermal convection in a porous layer saturated by Jeffrey nanofluid is studied. Three distinct boundary conditions are considered to be free-free. rigid-rigid and rigid-free boundaries. The model used for Jeffrey nanofluid includes the effect of Brownian motion and thermophoresis. https://www.lightemupsequences.com/mega-sale-Sky-Blue-Jade-Gemstone-Bracelet-with-Inner-Beauty-Sterling-Silver-Charm-mega-offer/