Verses with the word swearing in the Apocrypha (3 verses):

Sirach 23:9
Accustom not thy mouth to swearing; neither use thyself to the naming of the Holy One.

Sirach 23:11
A man that useth much swearing shall be filled with iniquity, and the plague shall never depart from his house: if he shall offend, his sin shall be upon him: and if he acknowledge not his sin, he maketh a double offence: and if he swear in vain, he shall not be innocent, but his house shall be full of calamities.

Sirach 23:13
Use not thy mouth to intemperate swearing, for therein is the word of sin.