תָּעָ֣ה לְבָבִ֔י פַּלָּצ֖וּת בִּֽעֲתָ֑תְנִי אֵ֚ת נֶ֣שֶׁף חִשְׁקִ֔י שָׂ֥ם לִ֖י לַחֲרָדָֽה׃
Pasmóse mi corazón, el horror me ha intimidado; la noche de mi deseo se me tornó en espanto.
Rashi
Your hastiness Heb. תפלצתך, an expression of haste, for you hurried and were hasty to arouse your hatred for your brother. And there are some who translate this as an expression of fright (פַּלָצוּת), and there are some who translate it as an expression of an image (מפלצת).