Most of them only follow conjecture. While conjecture does not avail against the truth in anything. God is knower of what they do.
Translation endnotes
[10:35-36] These verses also convict those who associate Muhammed as a partner with God in hukm (legislation/judgment). They confuse following the message of the messenger with following Muhammed. Verse 36, points at the source of their partnership: conjecture or hearsay. See 6:112; 12:111; 9:31.