Luke 9:32

Now Peter and those with him [i.e., James and John] had been very sleepy, but became wide awake when they saw the splendor of Jesus and the two men standing with Him.

John 1:14

[Eventually] this Word became a human being and lived among us [Note: The word "lived" here refers to pitching a temporary tent]. (And we saw His splendor; such splendor as belongs to the Father's only Son), full of God's favor and truth.

Matthew 26:40-43

And [when] He came [back] to where His disciples were and found them asleep, He said to Peter, "What [is this], could you not remain alert with me [in prayer] for one hour?

Luke 22:45-46

And when He got up from praying He went to His disciples and found them asleep, exhausted from grief.

John 17:24

"Father, I want those you gave me [i.e., the apostles, see verse 6] to be with me where I am [going], so they will see my splendor [i.e., in heaven], which you have given me, for you loved me before the creation of the world.

2 Peter 1:16

For we did not use cleverly conceived stories when we told you about the power and coming of our Lord Jesus Christ, because we were eyewitnesses of His Majesty [i.e., the apostles had personally seen the miraculous power of Jesus].

1 John 3:2

Dearly loved ones, we are God's children now, but it has not yet been revealed [to us] what we will be [in the future life, Luke 20:34-36]. But, we do know this, however, that when Jesus is revealed [i.e., at His second coming], we will be like Him [I Cor. 15:49], for we will see what He really looks like!

Revelation 22:4-5

and they will see His face, and His name will be [written] on their foreheads.

Treasury of Scripture Knowledge

Summary

But Peter and they that were with him were heavy with sleep: and when they were awake, they saw his glory, and the two men that stood with him.

Bible References

Were heavy

Luke 22:45
And when He got up from praying He went to His disciples and found them asleep, exhausted from grief.
Matthew 26:40
And [when] He came [back] to where His disciples were and found them asleep, He said to Peter, "What [is this], could you not remain alert with me [in prayer] for one hour?

They saw

John 1:14
[Eventually] this Word became a human being and lived among us [Note: The word "lived" here refers to pitching a temporary tent]. (And we saw His splendor; such splendor as belongs to the Father's only Son), full of God's favor and truth.
John 17:24
"Father, I want those you gave me [i.e., the apostles, see verse 6] to be with me where I am [going], so they will see my splendor [i.e., in heaven], which you have given me, for you loved me before the creation of the world.
2 Peter 1:16
For we did not use cleverly conceived stories when we told you about the power and coming of our Lord Jesus Christ, because we were eyewitnesses of His Majesty [i.e., the apostles had personally seen the miraculous power of Jesus].
1 John 3:2
Dearly loved ones, we are God's children now, but it has not yet been revealed [to us] what we will be [in the future life, Luke 20:34-36]. But, we do know this, however, that when Jesus is revealed [i.e., at His second coming], we will be like Him [I Cor. 15:49], for we will see what He really looks like!
Revelation 22:4
and they will see His face, and His name will be [written] on their foreheads.