1 Samuel 20:33

Then Saul hurled his spear at him to kill him. So Jonathan knew {that his father had decided} to kill David.

1 Samuel 18:11

Then Saul hurled the spear and thought, "{I will pin David to the wall}." But David eluded him twice.

1 Samuel 20:7

If he says 'Good,' [it will mean] peace for your servant; but if he [is] very angry, know that {he has decided to do me harm}.

1 Samuel 19:10

So Saul tried {to pin David to the wall with the spear}, but {he eluded Saul}, so that he struck the spear into the wall, and David fled and escaped that [same] night.

Treasury of Scripture Knowledge

Summary

And Saul cast a javelin at him to smite him: whereby Jonathan knew that it was determined of his father to slay David.

Bible References

Cast

1 Samuel 18:11
Then Saul hurled the spear and thought, "{I will pin David to the wall}." But David eluded him twice.
1 Samuel 19:10
So Saul tried {to pin David to the wall with the spear}, but {he eluded Saul}, so that he struck the spear into the wall, and David fled and escaped that [same] night.
Proverbs 22:24
Do not befriend an owner of {anger}, and with a man of wrath you shall not associate;
Ecclesiastes 9:3
This [is] the {injustice} that is done under the sun: the same fate [comes] to everyone. Also the hearts of {humans} are full [of] evil; delusion [is] in their hearts during their lives, and then they die.
Jeremiah 17:9
The heart [is] deceitful more than anything else, and it [is] disastrous. Who can understand it?

Whereby

1 Samuel 20:7
If he says 'Good,' [it will mean] peace for your servant; but if he [is] very angry, know that {he has decided to do me harm}.
Ecclesiastes 7:9
Do not be quick in your spirit to anger, for anger lodges in the bosom of fools.