Labour for me is human productive effort towards achieving set target.To answer the question, labour may be wealth, in the sense that when others labour while you fold your harms and watch from where will the wealth come from? Wealth creation cannot be separated from human effort both mental and physical.
My own definition of wealth is riches or assets that is stored and it can generate income even in your absence. Labor on it's own is work to earn money and if you just use the money to take care of your immediate basic needs it will become survival because you are not reserving anything for future needs. But when you earn money and invest it where it will yield more money in the future then it becomes wealth.
Many people in underdeveloped countries works hard meaning that they labor but they are not wealthy individuals because despite their struggling if their work stops their conditions will become worse off. Wealth is after using your skills to earn money then you can give your children quality education, have assets that can last into the future and you can rely on. People can inherit wealth while others have to struggle to make and build wealth, it doesn't come by work or labor alone.