Musnad Ahmad 31:693

Bahz narrated to us, Shu'bah narrated to us, Qatadah narrated to us, from Abu Nadrah, from Abu Sa'id al-Khudri, that he said: "We went out with the Messenger of Allah, may Allah bless him and grant him peace, on the nineteenth or seventeenth of Ramadan. Some fasted and some broke their fast, and those who fasted did not criticize those who broke their fast, nor did those who broke their fast criticize those who fasted."