עַ֭ל לֹא־חָמָ֣ס בְּכַפָּ֑י וּֽתְפִלָּתִ֥י זַכָּֽה׃
Although there is no violence in my hands, And my prayer is pure.
Rashi on Job
and my prayer is pure I did not curse my friend nor did I think any evil against him.
Malbim on Job
In heaven they know that he is guiltless; that his suffering is not proof of sin.