Hadith.5842 - The Commander of the Faithful, peace be upon him, said:
"A Muslim man continues to be recorded as a doer of good as long as he remains silent. But when he speaks, he is recorded either as a doer of good or a doer of evil."
Al-Kāfi #391“A believing servant (of Allah) is considered a person of good deeds as long as he does not speak. When he speaks he is considered a person...
Thawāb al-Aʿmāl wa ʿiqāb al-Aʿmāl #621“A believer is counted among virtuous till he is silent. As soon as he speaks, he is included either among good people or bad ones.”