# a strong, courageous man

Possible meanings are 1) "a great warrior" or 2) "a very brave man."

# one prudent in speech

"one wise in speech" or "one who speaks wisely"

# Yahweh is with him

Here "with him" means Yahweh helps and blesses David. (See: [[rc://en/ta/man/jit/figs-idiom]])