Ellis Walker, Epictetus in Poetical Paraphrase 43

XLIII. 

Avoid th' engagement of an oath, or swear,

As seldom as you can, at least forbear

To bind yourself to what you cannot do,
And only swear to that which lies in you:
For 'tis a wicked, blasphemous offence,
To call the gods to each impertinence;
To make them knights o'th'post, to testify
That to be truth, you know to be a lye.