Albert Barnes on Luke 24:49

The promise of my Father. The promise which the Father had made to them through the Saviour. See Mt 10:19, Jn 14:16,17,26. 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 Joel 2:28,29, compared with Acts 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 Acts 2:1 and following.

(o) "endue" Isa 44:3, Joel 2:28, Acts 2:1-21, 1:8