See you on the big drum
A good night phrase to children.

Seed money
Seed money is money that is used to start a small business.

See you anon
(UK) If somebody says this when leaving, they expect to see you again soon.

Safe and sound
If you arrive safe and sound, then nothing has harmed you on your way.

It's not the size of the man in the fight, it's the size of the fight in the man
This idiom means that determination is often more important than size, strength, or ability. ('It's not the size of the dog in the fight, it's the size of the fight in the dog.' is also used.)

It's no use crying over spilt milk
This idiom means that getting upset after something has gone wrong is pointless; it can't be changed so it should be accepted.
کار از کار گذشته و نمیشه کاریش کرد باید قبولش کرد

It never rains but it pours
'It never rains but it pours' means that when things go wrong, they go very wrong.
Is Saul also among the prophets?
It's a biblical idiom used when somebody known for something bad appears all of a sudden to be doing something very good

Indian summer
If there is a period of warmer weather in late autumn, it is an Indian summer.

In the zone
If you are in the zone, you are very focused on what you have to do.