ויבקש הדבר וימצא
“And the matter was investigated and found true.” (Esther 2:23)
Literally, the aforementioned words mean “and the thing was searched for and found” — what lost thing was searched for and found?
The Manos HaLevi explains that Bigsan and Seresh were angry for being overworked by Achashveirosh after he married Esther, so they planned to poison him (Megillah 13b). They put a snake in his water decanter so that the water he would drink would become poisoned and would kill him when he drank it. Upon hearing that the King learned of their plan they quickly removed the snake and discarded it and denied the allegation. Miraculously, Hashem created a new snake in the decanter. When the investigators searched for the thing — i.e. the snake — it was found, in the decanter.