1 Samuel 31:13 - Wesley's Explanatory Notes

Fasted — To testify their sorrow for the loss of Saul, and of the people of God; and to intreat God's favour to prevent the utter extinction of his people. But you must not understand this word of fasting strictly, as if they eat nothing for seven whole days; but in a more large sense, as it is used both in sacred and profane writers; that they did eat but little, and that but mean food, and drank only water for that time. This book began with the birth of Samuel, and ends with the death of Saul: The comparing these together will teach us to prefer the honour that comes from God, before all the honours of the world.