He prepared a path for his anger; he did not spare them from death but gave them over to the plague.
NIV
He leveled and made a straight path for His anger [to give it free course]; He did not spare [the Egyptian families] from death but gave their beasts over to the pestilence and the life [of their eldest] over to the plague.
AMP
He made a way to his anger; he spared not their soul from death, but gave their life over to the pestilence;
KJV