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.
There are different definitions of the term "wealth":
an abundance of valuable possessions or money:
"he used his considerable wealth to bribe officials"
Similar:
affluence
prosperity
opulence
riches
means
the state of being rich; material prosperity:
"some people buy boats and cars to display their wealth"
Similar:
prosperity
prosperousness
successfulness
plentiful supplies of a particular resource:
"the country's mineral wealth"
a plentiful supply of a particular desirable thing:
"the tables and maps contain a wealth of information"
Similar:
abundance
profusion
plethora
mine
store
archaic
well-being.
Labor is what creates value. Labor is one of the main sources of wealth, but not all wealthy people are hardworking and productive. All the "trust fund babies", who have rich parents are obviously wealthy, but didn't do anything to deserve that abundance and standard of living.
The medieval aristocracy was also very wealthy, but without putting any productive work into building their own wealth. The same applies to the "oil monarchies" in the Persian Gulf. Having lots of natural resources could bring wealth to your nation(if certain conditions are met).
Labor in itself isn't enough to achieve wealth. The world is full of hardworking people, who are poor. Intellectual labor is way more valuable than physical labor.