Hadith #5036 (Sunan Abi Dawud)
Book: General Behavior (Kitab Al-Adab)
Narrator(s): Abu Barda bin Abi Musa al-Asha'ari أبو بردة / الحارث بن أبي موسى الأشعري, Abu Musa al-Asha'ari, Hakeem bin al-Daylm حكيم بن الديلم, Sufyan bin Sa‘id Ath-Thawri سفيان الثوري, Uthman bin Muhammad, Waki' bin al-Jarrah وكيع بن الجراح
Grade: Da'if

The Prophet (ﷺ) said: Invoke a blessing on one who sneezes three times; (and if he sneezes more often), then if you wish to invoke a blessing on him, you may invoke, and if you wish (to stop), then stop.

Source: https://parallelquran.com/hadith/sunan-abi-dawud-5036/