4
Saul said to his armor-bearer, “Draw your sword and run me through, or these uncircumcised fellows will come and abuse me.” But his armor-bearer was terrified and would not do it; so Saul took his own sword and fell on it.
5
When the armor-bearer saw that Saul was dead, he too fell on his sword and died.
This part, 1Ch 10:1-12 which gives an account of the last battle of Saul with the Philistines, and of his death and burial, is the same with 1Sa 31:1-13 see the notes there; the cause of his death follows in 1Ch 10:13.