I swear on my honour that I knew nothing about this.

我以人格担保我根本不知道这件事。

《牛津词典》

I swear on all I hold dear that I had nothing to do with this.

我拿我所在乎的一切发誓我与这件事情无关。

《柯林斯英汉双解大词典》

On average,students using swear words were able to keep their hand in the water for about two minutes.

VOA: special.2009.08.18

"It was a tradition in Anglo-American culture to swear oaths on a Bible."

VOA: special.2009.01.19

There's a huge difference between watching someone swear on the telly and watching someone swear outside a primary school.

BBC: Should swearing be against the law?

When reporters asked him whether he could demonstrate his loyalty to party inquisitors, he offered to swear on the bones of a saint, pull a sword out of a stone whatever was demanded of him.

ECONOMIST: Bagehot

Minimum service means they show up most of the time, they may show up on time and they may not swear while on the clock or be excessively rude, sarcasm will remain.

FORBES: Why Is Great Service So Rare?