What Should a Person Say or Do When He Eats and is Unsatisfied

Wahshi bin Harb (May Allah be pleased with him) reported:
Some of the Companions of Messenger of Allah ﷺ said: "We eat but are not satisfied." He ﷺ said, "Perhaps you eat separately." The Companions replied in affirmative. He then said: "Eat together and mention the Name of Allah over your food. It will be blessed for you."

[Abu Dawud].

عن وحشى بن حرب رضى الله عنه أن أصحاب رسول الله ﷺ قالوا: يا رسول الله ، إنا نأكل ولا نشبع قال: "فلعلكم تفترقون" قالوا: نعم. قال: فاجتمعوا على طعامكم، واذكروا اسم الله ، يبارك لكم فيه"