John Wesley on Isaiah 59:13

Lying - Transgressing here, and lying, seem to be one and the same thing, inasmuch as in their transgressing the law of God, they broke their solemn engagement to God upon mount Sinai. Departing - Turning from God to idols. Speaking - As it were, talking of little else one among another, but how to oppress their neighbours, and apostatize from God. Uttering - That is, first contriving in their heart false accusations, false worship to the dishonour of God; laying the contrivances and uttering them. From the heart - And when they dealt with men in ways of fraud, it was from the heart, but when they spake with God it was but from the lip.