Reference: Fataawa al-Lajnah ad-Daa.imah lil-Buhooth al-‘Ilmiyyah wal-Iftaa. – Fatwa No.13561
Fataawa Ramadhaan – Volume 1, Page 225, Fatwa No.171
Question: In Ramadhaan last year (1409AH/1988AD), my husband returned home from work and when he entered the house he asked me to bring him a glass of water to drink so I didn’t remind him that he was fasting. I looked at him to confirm if he was fasting or not and it became clear that he had forgotten that he was [fasting]. So, I proceeded to bring him the glass of water to drink.
When he had drunk the water he remembered that he was fasting and admonished me for not reminding him of it. Then, I felt a fear of Allaah about this action of mine. Please inform me, and may Allaah reward you.
Response: You have committed a sin in bringing your husband, who was fasting, a glass of water to drink. It was befitting for you to remind him about the fast when he asked you for water. As for your husband’s fast that day, then it remains valid providing he drunk the water out of forgetfulness.
And with Allaah lies all the success, and may Allaah send prayers and salutations upon our Prophet Muhammad (sal-Allaahu ‘alayhi wa sallam) and his family and his companions.