Today's phrase is 'First come, first served'!
It means that people will be served in the order that they arrive, ask or apply. This is most common in sales, restaurants, and taxis, where people line up to use a service.
"The restaurant is so popular, it doesn't take reservations. All seating is first come, first served."
"There are only a limited number on sale, so it's first come, first served."
First come, first servedとは、『早い者勝ち』という意味です。