Weimarishsche Bibel-Werk, Matthew 11:13-15

Because all the prophets and the law have prophesied (that Christ should come) until John (who declared Christ to be present).

And if you can receive (and believe) it, he (that is, John the Baptist) is Elijah who is to come (he it is of whom Malachi prophesied that he should come in the spirit and power of Elijah, before the great and terrible day of the Lord—Mal. 4:5; Matt 17:12; Mark 9:13; Luke 1:17)

He who has ears to hear, let him hear (that is, note and hold it in his heart and so not wait like the Pharisees for Elijah the Tishbite to return in his own person to the earth or for the Kingdom of heaven to show up with worldly glory—Luke 17:20)