Romans 12:15

Be happy with those who are joyful. Cry with those who are sad.

John 11:19

and many of Martha and Mary's Jewish friends had come to comfort them over [the loss of] their brother.

1 Corinthians 12:26

So, if one part [i.e., one Christian] suffers, then all the parts [i.e., the other Christians] should suffer with it. Or, if one part is honored, all the [other] parts should rejoice with it.

Hebrews 13:3

Remember [to pray for and help] those who are in prison, as though you [yourselves] were in prison with them. [Remember] those who are being mistreated, realizing that you [yourselves] also share [with them] a physical body [i.e., you are subject to the same kind of trials].

Treasury of Scripture Knowledge

Summary

Now when Job's three friends heard of all this evil that was come upon him, they came every one from his own place; Eliphaz the Temanite, and Bildad the Shuhite, and Zophar the Naamathite: for they had made an appointment together to come to mourn with him and to comfort him.

Bible References

To come

John 11:19
and many of Martha and Mary's Jewish friends had come to comfort them over [the loss of] their brother.
Romans 12:15
Be happy with those who are joyful. Cry with those who are sad.
1 Corinthians 12:26
So, if one part [i.e., one Christian] suffers, then all the parts [i.e., the other Christians] should suffer with it. Or, if one part is honored, all the [other] parts should rejoice with it.
Hebrews 13:3
Remember [to pray for and help] those who are in prison, as though you [yourselves] were in prison with them. [Remember] those who are being mistreated, realizing that you [yourselves] also share [with them] a physical body [i.e., you are subject to the same kind of trials].