待我长发及腰已成千年老
[dài wŏ zhăng fā jí yāo yĭ chéng qiān nián lăo]
'Wait Till My Hair Reaches My Waist; A Thousand Years Shall Pass' conveys waiting so long that by the time the condition is met (long flowing hair), eons might have passed. This shows a dedication through extensive time.