And he said unto Moses, I thy father in law Jethro am come unto thee, and thy wife, and her two sons with her. And he said unto Moses - That is, by a messenger; in consequence of which Moses went out to meet him, as is stated in the next verse, for an interview had not yet taken place. This is supported by reading הנה hinneh, behold, for אני ani, I, which is the reading of the Septuagint and Syriac, and several Samaritan MSS.; instead therefore of I, thy father, we should read, Behold thy father, etc. - Kennicott's Remarks.
Related Commentaries of Exodus 18:6
Exodus 18:6
6 And he said unto Moses, I thy father in law Jethro am come unto thee, and thy wife, and her two sons with her.