The men and women of Israel needed to repent from their disobedience and return to faith in God. They needed to be immersed into the name of Yeshua for the forgiveness of their sins and receive the gift of God’s Spirit. Three thousand Jewish men and women repented and turned back to God that day. They received forgiveness of their sins and the Holy Spirit was poured into their hearts (Acts 2:41). Their hearts of stone were changed into hearts of flesh and the new covenant prophesied by Ezekiel and Jeremiah, instituted and promised by Yeshua, had begun in Jerusalem on Shavuot with Israel.