Abu Hurairah (May Allah be pleased with him) reported:
Whenever the Messenger of Allah (ﷺ) sneezed, he would cover his mouth with his hand or a piece of cloth, suppressing the sound this way.[Abu Dawud and At-Tirmidhi]. (ES)
App reference (ES): Book 6, Hadith 38 (ES)
Arabic/English book reference (ES): Book 6, Hadith 882 (ES)