Berean Standard Bible (BSB)
Then Saul hurled his spear at Jonathan to kill him; so Jonathan knew that his father was determined to kill David.
World English Bible (WEB)
Saul cast his spear at him to strike him. By this Jonathan knew that his father was determined to put David to death.
Strong's King James
And Saul{H7586} cast{H2904}{(H8686)} a javelin{H2595} at him to smite{H5221}{(H8687)} him: whereby Jonathan{H3083} knew{H3045}{(H8799)} that it was determined{H3617} of his father{H1} to slay{H4191}{(H8687)} David{H1732}.
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The F.O.G Message *
Young's Literal Translation
And Saul casteth the javelin at him to smite him, and Jonathan knoweth that it hath been determined by his father to put David to death.