Commentary for Berakhot 79:1
אמר רב טול ברוך טול ברוך אינו צריך לברך הבא מלח הבא לפתן צריך לברך ור' יוחנן אמר אפי' הביאו מלח הביאו לפתן נמי א"צ לברך גביל לתורי גביל לתורי צריך לברך ורב ששת אמר אפילו גביל לתורי נמי אינו צריך לברך דאמר רב יהודה אמר רב אסור לאדם שיאכל קודם שיתן מאכל לבהמתו שנא' (דברים יא, טו) ונתתי עשב בשדך לבהמתך והדר ואכלת ושבעת:
Rab declared: [If one broke the bread and pronounced the benediction, and before eating handed a piece to another saying,] "Take it, the benediction has been made; take it, the benediction has been made ! " it is unnecessary for him to pronounce it again [before partaking of the bread]. [But if before eating he says,] "Bring salt, bring the relish," he must repeat the benediction. R. Johanan declared that even if he said, "Bring salt, bring the relish," he likewise need not repeat the benediction. [Should he, however, say,] "Mix food for the oxen ! Mix food for the oxen !" the benediction must be repeated. Rab Sheshet declared that even if he said "Mix food for the oxen," he also need not repeat the benediction. For Rab Judah said in the name of Rab: A man must not eat his meal before giving food to his cattle ; as it is said, "And I will give grass in thy fields for thy cattle" and then "thou shalt eat and be satisfied" (Deut. xi. 15).