Mark 9:7
Then a cloud appeared and covered them, and a voice came from the cloud: this is my Son, whom I love. Listen to him! — the cloud is the Shekinah — the cloud of divine presence that covered Sinai (Exodus 19:9), filled the tabernacle (Exodus 40:34), and led Israel through the wilderness (Exodus 13:21). The voice from the cloud repeats the baptismal declaration (this is my Son, whom I love) with the crucial addition: listen to him. The addition is the transfiguration's specific application: in the presence of Moses (the law) and Elijah (the prophets), the voice says not observe the law or follow the prophets but listen to him. Jesus supersedes even these.