When I wish someone a good thing, I would say: God protects you. But I have found all expressions that pray to God use verbs without "s". Now I need to know what is the correct one. God protects you and helps you.
God protect you
This is a wish: may God protect you. When it comes to greetings, words are often omitted. It's like saying 'see you', which is short for 'I hope to see you again (soon)'.
God protects you
This is the active form, implying that God is actively protecting you.
As a greeting it might be used as an assurance or a reminder.