en_tn/gen/49/06.md

O my soul ... my heart

Jacob uses the words "soul" and "heart" to refer to himself and is saying that other people,and perhaps God also, honor him so much that he does not wish to join with those who make plans to do evil. (See: rc://en/ta/man/jit/figs-synecdoche)

do not come into their council; do not join in their meetings

These two phrases mean basically the same thing. Jacob combines them to emphasize that he does not want to participate in their wicked plans. Alternate translation: "I certainly will not join with them to make any plans" (See: rc://en/ta/man/jit/figs-parallelism)

they hamstrung oxen

This refers to Simeon and Levi crippling oxen just for fun.

hamstrung

This refers to cutting the sinews of an animal's leg so that it cannot walk.