Bible Verses About Prayer: Crying to heaven

Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.

Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.

Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;

Rejoicing in hope; patient in tribulation; continuing instant in prayer;

And all things, whatsoever ye shall ask in prayer, believing, ye shall receive.