What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

81 x 9 = 801. What must you do to make the this equation true?

What is the word or phrase?

What English word has three consecutive double letters?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

What has no start, end, or centre?

My thunder comes before lightning.
My lightning comes before my rain.
My rain dries up all the land it touches.

Who am I?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?