Sforno on Genesis 24:20/ספורנו על בראשית כ״ד:כ׳

1ותמהר, by being quick in what one does, a person performing a service indicates that the one whom she serves is someone esteemed highly in his eyes. Rivkah expressed this by the speed with which she went about her tasks.

2ותרץ עוד אל הבאר, the one in front of the well ((מעיין which was designed for the beasts to drink from.