Let not your heart be troubled: ye believe in God, believe also in me.
In my Father's house are many mansions: if it were not so, I would have told you. I go to prepare a place for you.
And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also.

John 14:1-3

Which also said, Ye men of Galilee, why stand ye gazing up into heaven? 
this same Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven.

Acts 1:11

And Jesus said, I am: and ye shall see the Son of man sitting on the right hand of power, and coming in the clouds of heaven.

Mark 14:62

Behold, he cometh with clouds; and every eye shall see him, 
and they also which pierced him: and all kindreds of the earth shall wail because of him. Even so, Amen.

Revelation 1:7

But I would not have you to be ignorant, brethren, concerning them which are asleep, 
that ye sorrow not, even as others which have no hope.
For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him.
For this we say unto you by the word of the Lord, that 
we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep.
For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: 
and the dead in Christ shall rise first:
Then we which are alive and remain shall be caught up together with them in the clouds, 
to meet the Lord in the air: and so shall we ever be with the Lord.

1 Thessalonians 4:13-17