Reference for Megillah 35:6

מאי חזית דסמכת אהאי סמוך אהאי מסתברא עבודה והודאה חדא מילתא היא

What was seen to consider this verse more than that verse? It is explained, that worship and thanksgiving are one [Hebrew] word [in the verse; the word 'Todah' means both a sacrifice and thanks].

Jastrow