AlltheIsraelitesweretroubled - Abner was their great support; and on him they depended; for it appears that Ish-bosheth was a feeble prince, and had few of those qualities requisite for a sovereign.
Matthew Henry
Concise Bible Commentary
See how Ishbosheth was murdered! When those difficulties dispirit us, which should sharpen our endeavours, we betray both our heavenly crowns and our earthly lives. Love not sleep, lest thou come to poverty and ruin. The idle soul is an easy prey to the destroyer. We know not when and where death will meet us. When we lie down to sleep, we are not sure that we may not sleep the sleep of death before we awake; nor do we know from what hand the death-blow may come.
SDA Bible Commentary (limited)
Volume 1-7
1. His hands were feeble. When Abner died the strength of Ish-bosheth was gone, and the king knew that his cause was doomed. The men of Israel were troubled, because Abner had been the strong hand at the helm. They knew that it was now probably only a question of time before Ish-bosheth would be eliminated and David would take over the kingdom.