誓言是蠱惑人心的毒藥
[shì yán shì gŭ huò rén xīn de dú yào]
In English, this translates to 'Vows are the bewitching poison to the mind.' Warning that pledges of commitment, such as marriage vows or declarations of love, although seemingly sweet and charming, carry the potential danger and destructiveness associated with toxic effects like deception or entanglement.