Matthew 28:19-20:
19 Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, 20 teaching them to observe all that I have commanded you. And behold, I am with you always, to the end of the age.” [ESV]
19 Go, therefore, and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit, 20 teaching them to follow all that I commanded you; and behold, I am with you always, to the end of the age.” [NASB]
19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: 20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen. [KJV]
19 having gone, then, disciple all the nations, (baptizing them -- to the name of the Father, and of the Son, and of the Holy Spirit, 20 teaching them to observe all, whatever I did command you,) and lo, I am with you all the days -- till the full end of the age.' [YLT]
What did Jesus mean by "the end of the age"?