Depending on the translation, the second part of the first line is either a statement or a question. "Where my help comes from." Or "Where does my help come from?" Whatever the punctuation, the answer is: "My help comes from God who made heaven and earth."
That is a wonderful place for one's help to come from. When we consider the definition of a god who made the universe, we realize this is a god who knows geography, physics, biology, nutrition, mathematical laws, spiritual laws, physical laws. He knows where everyone is, knows who is sleeping, knows who is eating, knows what everyone is thinking. He is aware of the evils approaching toward our lives and the evils that are already afflicting us.
It is declared boldly here that "The Lord is my keeper." Cain's retort to God's question about the whereabouts of Abel was "Am I my brother's keeper?" It was a snarky comment, a pun on the fact that Abel was a keeper of animals. It is also the very typical human response to God's command that we care for each other. But here, the psalmist proudly proclaims that God is his keeper. The Creator God who made the heaven and the earth is the one who guards, protects, feeds, and takes care of him. God is the keeper who always has a sleepless eye on me.
1I will lift up mine eyes unto the hills, from whence cometh my help.
2My help cometh from the LORD, which made heaven and earth.
3He will not suffer thy foot to be moved: he that keepeth thee will not slumber.
4Behold, he that keepeth Israel shall neither slumber nor sleep.
5The LORD is thy keeper: the LORD is thy shade upon thy right hand.
6The sun shall not smite thee by day, nor the moon by night.
7The LORD shall preserve thee from all evil: he shall preserve thy soul.
8The LORD shall preserve thy going out and thy coming in from this time forth, and even for evermore.