Deuteronomy 34:5-8

So Moses, the servant of the LORD, died there in the land of Moab, just as the LORD had said. The LORD buried him in a valley near Beth-peor in Moab, but to this day no one knows the exact place. Moses was 120 years old when he died, yet his eyesight was clear, and he was as strong as ever. The people of Israel mourned for Moses on the plains of Moab for thirty days, until the customary period of mourning was over.