誓言落魄了流年
[shì yán luò pò le liú nián]
Suggests that vows ('誓言' means 'oath') were affected by ('落魄了' meaning deteriorated or faded due to) the passage of time ('流年' literally meaning the flowing years). It could imply disappointment or changes caused by aging or evolving circumstances, leading promises not to remain as steadfast as intended.