“You have kept count of my tossings.

Put my tears in your bottle!

Are they not in your record?

Then my enemies will retreat,

In the day when I call.

This I know,

That God is for me.

In God,

Whose word I praise.

In Yahweh,

Whose word I praise.

In God,

I trust.

I am not afraid.

What can a mere mortal do to me?”

God knew about the situation of David.  He had gathered the tears of David and kept a record of it.  His enemies would retreat if David were to call on God.  He was sure of himself because God was on his side.  He praised God.  He praised Yahweh.  He trusted in God.  Thus he was not afraid of mere mortals?