The ruling on one who speaks during prayer out of forgetfulness

Q: If a person speaks during prayer out of forgetfulness, is his prayer invalidated?

A: If a Muslim speaks during prayer out of forgetfulness or ignorance, his prayer is not invalidated by that, whether it is obligatory or voluntary. This is based on the saying of Allah, the Exalted: [al-Baqarah: 286]. It is also established in the authentic collections that the Prophet (peace and blessings be upon him) reported that Allah, the Exalted, said: .
In Sahih Muslim, it is narrated from Mu'awiyah ibn al-Hakam al-Sulami (may Allah be pleased with him) that he responded to a sneeze during prayer out of ignorance of the legal ruling. The people around him disapproved of this by gesturing to him. He then asked the Prophet (peace and blessings be upon him) about it, and the Prophet did not order him to repeat the prayer. The one who forgets is like the one who is ignorant, and even more so; and because the Prophet (peace and blessings be upon him) spoke during prayer out of forgetfulness, and he did not repeat it, rather he completed it, as in the authentic hadiths from Ibn Mas'ud, 'Imran ibn Husayn, and Abu Hurayrah (may Allah be pleased with them) . As for gesturing during prayer, there is no harm in it if there is a need for it.