1 Chronicles 10:12

and all the men of valour rise and bear away the body of Saul, and the bodies of his sons, and bring them in to Jabesh, and bury their bones under the oak in Jabesh, and fast seven days.

Genesis 35:8

And Deborah, Rebekah's nurse, dieth, and she is buried at the lower part of Bethel, under the oak, and he calleth its name 'Oak of weeping.'

Genesis 50:10

And they come unto the threshing-floor of Atad, which is beyond the Jordan, and they lament there, a lamentation great and very grievous; and he maketh for his father a mourning seven days,

2 Samuel 3:35

And all the people come to cause David to eat bread while yet day, and David sweareth, saying, 'Thus doth God to me, and thus He doth add, for -- before the going in of the sun, I taste no bread or any other thing.'

2 Samuel 21:12-14

and David goeth and taketh the bones of Saul, and the bones of Jonathan his son, from the possessors of Jabesh-Gilead, who had stolen them from the broad place of Beth-Shan, where the Philistines hanged them, in the day of the Philistines smiting Saul in Gilboa;

Treasury of Scripture Knowledge

Summary

They arose, all the valiant men, and took away the body of Saul, and the bodies of his sons, and brought them to Jabesh, and buried their bones under the oak in Jabesh, and fasted seven days.

Bible References

The oak

Genesis 35:8
And Deborah, Rebekah's nurse, dieth, and she is buried at the lower part of Bethel, under the oak, and he calleth its name 'Oak of weeping.'
2 Samuel 21:12
and David goeth and taketh the bones of Saul, and the bones of Jonathan his son, from the possessors of Jabesh-Gilead, who had stolen them from the broad place of Beth-Shan, where the Philistines hanged them, in the day of the Philistines smiting Saul in Gilboa;

Fasted

Genesis 50:10
And they come unto the threshing-floor of Atad, which is beyond the Jordan, and they lament there, a lamentation great and very grievous; and he maketh for his father a mourning seven days,
2 Samuel 3:35
And all the people come to cause David to eat bread while yet day, and David sweareth, saying, 'Thus doth God to me, and thus He doth add, for -- before the going in of the sun, I taste no bread or any other thing.'