What is the meaning of Luke 24:49?

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)

And behold, I send forth the promise of my Father upon you: but tarry ye in the city, until ye be clothed with power from on high. (Luke 24:49 ASV)

And behold, I send the promise of my Father upon you; but do ye remain in the city till ye be clothed with power from on high. (Luke 24:49 DBY)

And, lo, I do send the promise of my Father upon you, but ye–abide ye in the city of Jerusalem till ye be clothed with power from on high. (Luke 24:49 YLT)

Behold, I send forth the promise of my Father on you. But wait in the city of Jerusalem until you are clothed with power from on high. (Luke 24:49 WEB)

Interlinear

And, <kai> behold, <idou> I <ego> send <apostello> the promise <epaggelia> of my <mou> Father <pater> upon <epi> you: <humas> but <de> tarry <kathizo> ye <humeis> in <en> the city <polis> of Jerusalem, <Hierousalem> until <heos> ye <hos> be endued <enduo> with power <dunamis> from <ek> on high. <hupsos> (Luke 24:49 KJV)

Albert Barnes’ Commentary

Verse 49. The promise of my Father. The promise which the Father had made to them through the Saviour. See Mt 10:19; Joh 14:16; Joh 14:17; Joh 14:26. The promise was, that they should be aided by the power of the Holy Ghost. He also doubtless referred to the promise of God, made in the days of Joel, respecting the outpouring of the Holy Ghost.  See Joe 2:28-29, compared with Ac 2:16-21.

Endued with power from on high. The power which would be given them by the descent of the Holy Ghost –the power of speaking with tongues, of working miracles, and of preaching the gospel with the attending blessing and aid of the Holy Ghost. This was accomplished in the gift of the Holy Spirit on the day of Pentecost. See Ac 2:1 and following.

{o} “endue” Isa 44:3; Joe 2:28; Ac 2:1-21; Ac 1:8