Quran about Swearing?

[Anjum]

Salam All,

I wanted to know, what does Quran actually say about swearing?

Actually, me and my hubby had a fight...he was like swearing..i scolded you..because..you did that...and as far as i remember..i didnt do what i was accused of...so emotionally..i was swearing that..i didnt...but we both..did not swear on God...are we accountable for anything?..because..either..him or i must be lying...may be...but was our swearing wrong?..should we pay any penalty?

Kindly clear it please...sorry for such silly questions.

Regards,
Anjum