You'll buy nothing but trouble if you buy that house, take my word for it.

你如果买了那幢房子，买到的只有麻烦，相信我的话。

《柯林斯英汉双解大词典》

I am not a bad man, take my word for it, but I have done wrong.

我不是坏人，相信我的话，我只是做了错事。

youdao

Take my word for it, I'll give you a lesson that you'll remember for a long while.

相信我的话，我会给你一个教训，你会记得很久。

youdao

And again,don't take my word for it of course.

别盲目相信我的话。

哈佛公开课 - 幸福课课程节选