Mark 9:41

For whoever gives you a cup of water to drink in [my] name because you are Christ's, truly I say to you that he will never lose his reward.

Matthew 10:42

And whoever gives one of these little ones only a cup of cold water to drink in the name of a disciple, truly I say to you, he will never lose his reward."

Matthew 25:40

And the king will answer [and] say to them, 'Truly I say to you, in as much as you did [it] to one of the least of these brothers of mine, you did [it] to me.'

John 19:25-27

Now his mother and the sister of his mother, Mary the [wife] of Clopas, and Mary Magdalene were standing near the cross of Jesus.

Romans 8:9

But you are not in the flesh but in the Spirit, if indeed the Spirit of God lives in you. But if anyone does not have the Spirit of Christ, this person {does not belong to him}.

Romans 14:15

For if because of food, your brother is grieved, you are no longer living according to love. Do not destroy by your food that person for whom Christ died.

1 Corinthians 3:23

and you [are] Christ's, and Christ [is] God's.

1 Corinthians 15:23

But each in his own group: Christ the first fruits, then those [who are] Christ's at his coming,

2 Corinthians 10:7

You are looking at things according to appearance. If anyone is convinced he himself is Christ's, he should consider this concerning himself again: that just as Christ himself [is], so also [are] we.

Galatians 3:29

And if you [are] Christ's, then you are descendants of Abraham, heirs according to the promise.

Galatians 5:24

Now those {who belong to Christ} have crucified the flesh together with its feelings and its desires.

Treasury of Scripture Knowledge

Summary

For whosoever shall give you a cup of water to drink in my name, because ye belong to Christ, verily I say unto you, he shall not lose his reward.

Bible References

Whosoever

Matthew 10:42
And whoever gives one of these little ones only a cup of cold water to drink in the name of a disciple, truly I say to you, he will never lose his reward."
Matthew 25:40
And the king will answer [and] say to them, 'Truly I say to you, in as much as you did [it] to one of the least of these brothers of mine, you did [it] to me.'

Because

John 19:25
Now his mother and the sister of his mother, Mary the [wife] of Clopas, and Mary Magdalene were standing near the cross of Jesus.
Romans 8:9
But you are not in the flesh but in the Spirit, if indeed the Spirit of God lives in you. But if anyone does not have the Spirit of Christ, this person {does not belong to him}.
Romans 14:15
For if because of food, your brother is grieved, you are no longer living according to love. Do not destroy by your food that person for whom Christ died.
1 Corinthians 3:23
and you [are] Christ's, and Christ [is] God's.
1 Corinthians 15:23
But each in his own group: Christ the first fruits, then those [who are] Christ's at his coming,
2 Corinthians 10:7
You are looking at things according to appearance. If anyone is convinced he himself is Christ's, he should consider this concerning himself again: that just as Christ himself [is], so also [are] we.
Galatians 3:29
And if you [are] Christ's, then you are descendants of Abraham, heirs according to the promise.
Galatians 5:24
Now those {who belong to Christ} have crucified the flesh together with its feelings and its desires.