She sneezed loudly, and I said bless you.
bless you
idiomSaid to someone who has just sneezed, as a polite remark.
Origin
disputed originShort for God bless you, from Middle English God blesse you, God blisse you.
When my colleague sneezed during the meeting, everyone turned and said bless you at the same time.
The old woman, sitting alone in the empty church, sneezed into her handkerchief; the priest paused his reading and quietly said bless you.