Titus 1:14, Jewish fables. Paul can’t be referring to the Torah here, which he strongly upholds and defends in numerous other places in his writings (Rom 3:31; 7:7, 12, 14; 13:8–10; 1 Cor 7:19; 9:21; Gal 3:10; 6:2; 2 Tim 6:14; Tit 2:14) and even claims to follow (Acts 21:24; 24:1425:8; 28:17; 1 Cor 9:21). He must be talking about the Jewish traditions of men, which Yeshua said in Matthew 15:3–9 and Mark 7:7–9 make of non-effect the word of Elohim.
In fact, this is exactly what Paul is referring to here in this verse when he says “Jewish fables and commandments of men.” This is not a reference to the Torah, which came from YHVH Elohim, and not froms men. In the same verse, Paul contrasts these commandments of men with “the truth” from which men have turned away. What is this truth? The Bible defines its own terms. Elohim is the source of truth (Deut 32:4 cp. Pss 86:11; 89:14; 117:2), he is truth (Ps 25:10; 31:5; 33:4), and his Torah is truth (Ps 119:142, 151).
One example of a Jewish fable and a commandment of men would be the idea that one can’t be saved unless they’re first circumcised, which was the subject of the Acts 15 council. Paul vehemently fought this Jewish fable, and the whole Book of Galatians, for example, largely deals with this issue. If Paul had meant the Torah when mentioning “Jewish fables” then this makes Paul into a schizophrenic liar (since he promotes and lauds the Torah and claims to follow it elsewhere), and it makes the word of Elohim contradict itself, and it puts Paul at odds with Yeshua who upheld the Torah (Matt 5:17–19) and with himself when he said to imitate Yeshua the Torah-keeper as he himself did (1 Cor 11:1).