> (intransitive, rare) Followed by' to or unto: to adhere, cling, or stick fast to something.
Something can cleave to another thing, but you can't cleave two things together. It's grammatically the same as the word "cling". You can cling to something but you can't cling two things together. It doesn't make sense.
https://en.wiktionary.org/wiki/cleave#Etymology_2
> (intransitive, rare) Followed by' to or unto: to adhere, cling, or stick fast to something.
Something can cleave to another thing, but you can't cleave two things together. It's grammatically the same as the word "cling". You can cling to something but you can't cling two things together. It doesn't make sense.