Malachi 2:6

The law of truth was in his mouth
The Gospel, the word and doctrine of truth; which comes from the God of truth; is concerning Christ the truth and men are guided into it by the Spirit of truth; it contains most glorious truths, and nothing but truth: and this was in the mouth of Christ, being put there by his Father, who gave him what he should say, and what he should speak; and which was preached by him in the most faithful manner, and so as it never was by any other, for which he was abundantly qualified: and iniquity was not found in his lips;
there was none in his nature; nor in his heart; nor in his life; nor in his lips; none could be found there by men nor devils: there was no falsehood in his doctrines; no deceit in his promises; no dissimulation in his expressions of love to men; nothing vain, light, frothy, and unprofitable, dropped from him in common conversation; no reviling in return to his enemies; nor any impatient expressions or murmurings at the time of his sufferings and death, ( 1 Peter 2:22 1 Peter 2:23 ) : he walked with me in peace and equity:
he walked with God, he had communion with him; though he was sometimes left alone, he was not alone, God was with him; he was conformable to his will, and walked according to it, in obedience to his law, moral and ceremonial, and in the discharge of all religious duties: he walked with God "in peace", without quarrelling with any of his dispensations towards him; he did nothing to break the peace that subsisted between them, but always did the things which pleased his father, and had peace in what he did; and he walked with him in "equity", or righteousness, fulfilling his righteous law, and bringing in an everlasting righteousness: and did turn many away from iniquity;
doctrinal and practical; which is to be understood, not of a bare reformation only in principle and practice, but of true real conversion; of which there were many instances under the ministry of his forerunner John the Baptist, and under his own ministry when in person on earth; and under the ministry of his apostles, attended with his Spirit and power, both in Judea, and in the Gentile world.