And, behold, I send the promise of my Father upon you: but tarry ye in the city of Jerusalem, until ye be endued with power from on high. Luke 24:49 KJV
The promise of the Father is the glorious baptism in the Holy Spirit. You will speak in tongues and you will receive supernatural power.
John the Baptist said,
I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire: Matthew 3:11 KJV
Jesus is the baptized. Ask Him and He will baptize you in the Holy Spirit and you will receive and speak with another tongue.
And when the day of Pentecost was fully come, they were all with one accord in one place. And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting. And there appeared unto them cloven tongues like as of fire, and it sat upon each of them. And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance. Acts 2:1-4 KJV