十指紧扣不离不弃十指相扣不离不弃
[shí zhĭ jĭn kòu bù lí bù qì shí zhĭ xiāng kòu bù lí bù qì]
The repetition emphasizes the vow of not parting; 'ten fingers intertwined, never leaving each other,' expressing commitment in relationships such as friendships, lovers etc., where two people pledge lifelong dedication.