Adam Clarke on 1 Samuel 9:24

The shoulder, and that which was upon it - Probably the shoulder was covered with a part of the caul, that it might be the better roasted. The Targum has it the shoulder and its thigh; not only the shoulder merely, but the fore-leg bone to the knee; perhaps the whole fore-quarter. Why was the shoulder set before Saul? Not because it was the best part, but because it was an emblem of the government to which he was now called. See Isa 9:6 : And the government shall be upon his Shoulder.