Commentary for Berakhot 20:38

ובית הלל אומרים כל אדם קורא כדרכו שנאמר ובלכתך בדרך

But Bet Hillel say : A man reads it after his own manner; as it is said, "And when thou walkest by the way" (ibid.).

Abraham Cohen Footnotes to the English Translation of Masechet Berakhot