2 Timothy 4:15

Of whom be thou ware also
For he was now at Ephesus; and since he was such a malicious, ill natured, and troublesome person, as well as a blasphemer, an heretic, and had been delivered up to Satan, it was very advisable to shun his company, and have no conversation with him, and be upon the guard against him, that he might have no opportunity of doing hurt to him, or to the church at Ephesus:

for he hath greatly withstood our words:
or doctrines; the truths of the Gospel preached by Paul and Timothy, which he opposed himself to, and resisted with all his might, and endeavoured to confute and overthrow; and wherein he was deficient in argument, he made up with railing and blasphemy; and this was the true reason of the apostle's imprecations on him, and why he would have Timothy beware of him, and avoid him, and not the personal injury he had done him.