It wasnarrated from Ibn 'Umar that the Messenger of Allah (ﷺ)said:
"When food is served, eat from that which is in front of you,anddo not take from what is in front of your companion.'" (IT)
English reference (IT): Vol. 4, Book 29, Hadith 3273 (IT)
Arabic reference (IT): Book 29, Hadith 3398 (IT)