'Opening' in the Bible

After coming into the house they saw the Child with Mary His mother; and they fell to the ground and worshiped Him. Then, opening their treasures, they presented to Him gifts of gold, frankincense, and myrrh.

And Jesus, having been given baptism, straight away went up from the water; and, the heavens opening, he saw the Spirit of God coming down on him as a dove;

He opened His mouth and began to teach them, saying,

That it might come true which was said by the prophet, Opening my mouth, I will give out stories; I will give knowledge of things kept secret from before all time.