Legend has it that very early in the morning, there was a great flood on the ground. Many people and livestock drowned, and the crops were not left, all drowned.
People had to eat grass roots and bark, but in the end even the bark and grass roots were eaten clean, and people were going to starve to death. He prostrated himself all day long, hoping to give some seeds a good life.
The Jade Emperor knew about this, but he made a mistake and thought about it for half a day before he came up with an idea. They sent swallows and pigeons to look for seeds of grains. The swallows and the pigeons just fly, fly... It took seven days and seven hundred and forty-nine days to find the seeds of the grains. But how can you bring it back? The swallows and pigeons could only take all the seeds they were looking for into their mouths and fly back, so that they could send a message to the Jade Emperor.
The swallows and pigeons that flew to the tianhe river were tired and dry-mouthed, so they came to the river to drink water. This drinking water was broken, and the grain in his mouth was gargled into his stomach. This frightened the swallow, and it asked the pigeon busily: "Big brother pigeon, this time I swallowed all the seeds, why did you go back to the Jade Emperor?" The pigeon said, "Don't be afraid, don't be afraid, when the time comes, you will spit it out as soon as you goo."
They flew in front of the Jade Emperor, and the pigeons grunted and spit out the seeds, but the swallows couldn't spit out. At this time, the Jade Emperor was on fire: "The pigeons have merit in finding seeds, and in the future, the grains and grains in the world will be eaten by you." The swallow ate the seed, and if you did not do anything, you will not be allowed to eat another grain from now on! ”
You can't eat grain when you hit this swallow, so you have to catch some small insects in the air for half a day.
This is the origin of "pigeons do not eat panting, swallows do not eat on the ground".