The given condition can be shown with a proper FBD of the block, as below
Let us suppose the mass of the block is m and acceleration due to gravity is g. Normal reaction, N=mg‌cos‌θ Limiting friction, (fr)lim=µsN=µmg‌cos‌θ Net driving force, (F)‌net driving ‌=mg‌sin‌θ If the block remain motionless on the wedge, then