In today’s Triennial cycle reading Acts 1:10, Yeshua told the disciples to wait for the promise of the Father, the Holy Spirit. This was fulfilled 50 days later at Shavuot. The “Promise of the Father” is a phrase used during the Passover Seder, made to the the one who finds the Afikomen — Yeshua, the buried and resurrected Messiah. Anyone who finds Yeshua will be given the Holy Spirit.
“With numerous signs for 40 days Yeshua was seen” by the disciples. 10 days after His ascension was Shavuot, the manifestation of the Holy Spirit — flames of fire above their heads, speaking in tongues, preaching in the streets, and thousands being saved!