Is it permissible to respond to a sneeze during the Friday sermon?
Machine translationRead the Arabic original
The questioner : He says: If a person sneezes during the sermon, is it permissible to respond to him?
The Shaykh : If a person sneezes during the sermon, he is not to be responded to, even if he praises Allah and his neighbor hears it, he is not to respond to him. This is because it is not permissible for anyone to speak during the imam’s Friday sermon, except with the imam or in case of dire necessity. In case of dire necessity, for example, if a person sees someone about to fall into a pit and fears he will fall in and perish, he speaks. As for speaking with anyone other than the imam in a case of dire necessity, it is not permissible. May Allah reward you.
The Shaykh : If a person sneezes during the sermon, he is not to be responded to, even if he praises Allah and his neighbor hears it, he is not to respond to him. This is because it is not permissible for anyone to speak during the imam’s Friday sermon, except with the imam or in case of dire necessity. In case of dire necessity, for example, if a person sees someone about to fall into a pit and fears he will fall in and perish, he speaks. As for speaking with anyone other than the imam in a case of dire necessity, it is not permissible. May Allah reward you.
Source
دروس وفتاوى المسجد الحرام لعام 1417هـ - 31 — binothaimeen.net (1:00:25)
The Arabic text is a machine transcription of the audio recording.