Benefit: Ramaḍān - Do Sins Break the Fast
In the Name of Allāh, the Ever Merciful, the Bestower of Mercy
Faṭwá Series for Ramaḍān 2016 - featuring selected faṭāwá by Shaykh Aḥmad ibn Yaḥyá al-Najmī (رحمه الله).
[A]: Sins vary, and the sins which don't break the fast reduce the reward of the fasting person. However, there are sins that break the fast, such as masturbation, committing adultery and things similar to that—we ask Allāh for forgiveness and wellbeing. There is absolutely no doubt that those things break the fast.
Shaykh Aḥmad ibn Yaḥyá al-Najmī (رحمه الله).
Source: Fatāwá al-Ṣiyām pg 37.
Translated by: Musa Shaleem Mohammed