'Have Faith' in the Bible

Those by the side of the road are those who have given hearing; then the Evil One comes and takes away the word from their hearts, so that they may not have faith and get salvation.

And those on the rock are those who with joy give hearing to the word; but having no root, they have faith for a time, and when the test comes they give up.

But Jesus at these words said to him, Have no fear, only have faith, and she will be made well.

And they said among themselves, If we say, From heaven; he will say, Why did you not have faith in him?