John Gill Act 9:1
And Saul yet breathing out threatenings and slaughter,….The phrase here used is an Hebraism; so in Psa_27:12 יפח חמס, “one that breathes out violence”, or cruelty; and this shows the inward disposition of his mind, the rage, wrath, malice, envy, and blood thirstiness he was full of; and is observed to illustrate