Mukhtasar Bukhari (Abridged) 955 — Not eating or drinking until suhoor

Narrated from Sayyiduna Abu Sa'id Khudri, may Allah be pleased with him, that he heard the Messenger of Allah, peace and blessings be upon him, saying: "(O people!) Do not observe continuous fasting (without Suhoor and Iftar), and if any of you insists on doing so, then he may do so only until Suhoor."