You can find detailed exegesis of the Matthew 14 text for this week at:
"Miracles and Walking on Water," Gospel Analysis, Sermons from Seattle, Pastor Edward F. Markquart, Grace Lutheran Church, Seattle, Washington. Detailed background and exegesis.
Comments (commentary) and Clippings (technical notes for in-depth study), Chris Haslam, Anglican Diocese of Montreal.
"Exegetical Considerations," 12th Sunday after Pentecost, Richard Carlson, Lutheran Theological Seminary at Gettysburg, Using Greek for Sunday Text Preparations.
Exegesis, Proper 14A, by Richard Donovan at lectionary.org.
Exegetical Notes by Brian Stoffregen at CrossMarks Christian Resources.
"Take Courage! It Is I! Do Not Be Afraid!" Jerry Goebel, One Family Outreach. "Focus on scripture from a justice perspective." Exegesis, study, and teen study and activities.
"Jesus Walks on the Water," Rev. Bryan Findlayson, Lectionary Bible Studies and Sermons, Pumpkin Cottage Ministry Resources. Includes detailed textual notes.