Silsilah as-Sahihah 2708 — Replying to someone who sneezes three times

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings of Allah be upon him) said: "When someone sneezes, his companion should supplicate for him (by saying «يرحمك الله»), and if he sneezes more than three times, (it means) he has a cold, and in that case, he should not say «يرحمك الله»."