Halakhah su Esodo 20:7

To not swear in vain: That we not swear pointlessly, as it is stated (Exodus 20:7), "You shall not take the name of the Lord, your God, in vain." And the notion of pointlessness has four angles: [The first is,] for example (Shevuot 29a), that he swears about something known [to be true] that it is not so, like swearing about a pillar of marble that it is a pillar of gold. And so [too], anything like this. The second angle is, for example [Talmud Yerushalmi Shevuot 3:8], that he swears about what is known to be so, like about a stone that it is a stone and about a tree that it is a tree, and all that is like this. The third angle is that he swears to negate this commandment or the commandments that God, blessed be He, commanded us; as this is also completely pointless, since it is not in his hand to swear [to negate] that which God has already obligated him - and it is like the one who swears about something known that it is not so. The fourth angle is that he swears to do something that he does not have the power to do; for example (Shevuot 25a) that he will not sleep for three consecutive days, or that he will not eat for seven consecutive days. And so [too], anything like this.

Another practice questioned by Dr. Rabinowitz is constraint in pronouncing the terms Shaddai and Ẓeva'ot. The prohibition against vocalizing the name of God other than in the reading of Scripture, prayer, or recitation of blessings is derived from the positive commandment "The Lord your God shall you fear" (Deut. 6:13). Restraint in not mentioning the name of God in vain is a manifestation of fear and awe. Rav Aḥai Ga'on, She'iltot, Yitro, She'ilta 53, deems this to be a transgression of the negative prohibition "Thou shalt not take the name the Lord your God in vain" (Exod. 20:7). According to numerous authorities, e.g., Rambam Hilkhot Shevu'ot 12:11 (see Teshuvot R. Akiva Eger, no. 25), this prohibition embraces all of the seven names of God. Since both Shaddai and Ẓeva'ot are enumerated among the seven names of the Deity common practice is to use the assonant forms Shakai and Ẓevakot respectively as substitutes for these names. Dr. Rabinowitz' incredulity at this "strange mispronunciation of Hebrew" is misplaced.