'Labour' in the Bible

I sent you to reap that whereon ye bestowed no labour: other men laboured, and ye are entered into their labours.

Labour not for the meat which perisheth, but for that meat which endureth unto everlasting life, which the Son of man shall give unto you: for him hath God the Father sealed.

A woman, when she is in labour, has sorrow, because her time has come. But when she has given birth to the babe, she no longer remembers the pain, because of her joy at a child being born into the world.