Dua 2
If a non-Muslim says ”اَلْحَمْدُ لِلّٰهِ“ on sneezing, he should be told:
يَهْدِيْكُمُ اللّٰهُ وَيُصْلِحُ بَالَكُمْ
May Allah guide you and set your affairs right.
Sahih, Sunan Abi Dawud, no. (5038), Sunan at-Tirmidhi, no. (2739), al-Adab al-Mufrad of al-Bukhari, no. (940), and al-Albani graded it Sahih in “al-Irwa'” (5/119) no. (1277).