Ask, and it will be given to you; seek, and you will find; knock, and it will be opened to you. For everyone who asks receives, and he who seeks finds, and to him who knocks it will be opened (Matthew 7:7-8 NASB)
Cast your burden on Yahweh, and He will sustain you: He will never permit the righteous to be moved (Psalm 55:22)
I will not leave you comfortless: I will come to you (John 14:18 KJV).
Be not dismayed, neither be thou afraid, for the Lord thy God is with thee whithersoever though goest. I am the Lord thy God, is there anything to hard for me? (both are from Isaiah, but I can't remember exact chapter and verse)