Moses
Genesis 34:26ESV·traditional attribution

They killed Hamor and his son Shechem with the sword and took Dinah out of Shechem’s house and went away.

Matthew Henry Presbyterian @wholebiblehenry

Here, we have Simeon and Levi, two of Jacob's sons, young men not much above twenty years old, cutting the throats of the Shechemites, and thereby breaking the heart of their good father. I. Here is the barbarous murder of the Shechemites.

Commenting on Genesis 34:25-31

John Gill Reformed Baptist @doctorgill

The sons of Jacob came upon the slain,.... That is, the rest of them, as the Targum of Jonathan paraphrases it; understanding what their two brothers had done, they came and joined them, and partook of stripping the slain of their clothes, or from them what they found of any worth about them: and spoiled the city; plundered it of all its goods and substance...

Keil & Delitzsch Lutheran @keilanddelitzsch

Gen 34:25-29 But on the third day, when the Shechemites were thoroughly prostrated by the painful effects of the operation, Simeon and Levi (with their servants of course) fell upon the town בּטח (i.e., while the people were off their guard, as in Eze 30:9), slew all the males, including Hamor and Shechem, with the edge of the sword, i.e., without quarter (Num 21:24; Jos...

Commenting on Genesis 34:25-29