en_tn/gen/27/41.md

Esau bore a grudge against Jacob

Esau believed that Jacob had wronged him, and so Esau did not want to forgive Jacob.

Esau said in his heart

Here "heart" stands for Esau himself. Alternate translation: "Esau said to himself" (See: rc://en/ta/man/jit/figs-synecdoche)

days of mourning for my father are near

This refers to a number of days a person grieves when a family member dies.