Q: Can we fast without eating anything? Will a glass of water do?
A: To fast without having any Sehri is permissible. However, having at least a glass of water will earn one the reward of Sehri.
Mufti Siraj Desai
This answer was collected from AskMufti.co.za, which is operated under the supervision of Mufti Siraj Desai of Darul-Uloom Abubakr, South Africa.