PROPHET MUHAMMAD (ﷺ) said:
When one of you eats food, then let him say:

TRANSLATION:
In the Name of Allah.

When one of you eats food, then let him say: Bismillah (In the Name of Allah). If he forgets in the beginning, then let him say:

TRANSLATION:
In the Name of Allah in its beginning and its end.

PROPHET MUHAMMAD (ﷺ) said:
Whoever Allah feeds some food, then let him say:

TRANSLATION:
O Allah, bless it for us, and feed us better than it.

PROPHET MUHAMMAD (ﷺ) said:
Whomsoever Allah gives milk to drink, then let him say:

TRANSLATION:
O Allah bless it for us, and grant us increase in it.

PROPHET MUHAMMAD (ﷺ) said:
Whoever eats food and then says:

his past sins shall be forgiven.

TRANSLATION:
All praise is due to Allah who fed me this and granted it as provision to me, without any effort from me nor power.

Narrated Abu Umama:
Whenever the dining sheet of the Prophet (ﷺ) was taken away (i.e., whenever he finished his meal), he used to say:

TRANSLATION:
All the praises and than be to Allah! Much good and blessed praise! O our Lord. We cannot compensate Your Favour, nor can leave it, nor can dispense with it, O our Lord!

It was narrated that Al-Miqdâd said:
"I came with two companions of mine, and our hearing and sight had been affected by hunger. We presented ourselves to the Companions of the Messenger of Allah (ﷺ), but none of them could host us. We came to the Prophet (ﷺ) and he took us to his family. There were three goats there and the Prophet (ﷺ) said: 'Milk them and we will share the milk.' We used to milk them and each one of us would drink his share, and we would set aside the Prophet's (ﷺ) share for him. He (ﷺ) would come at night and would say Salaam in such a manner that would not wake one who was sleeping, but one who was awake would hear it. Then he (ﷺ) would go to the Masjid and pray, then he (ﷺ) would come to his (ﷺ) drink and drink it. One night the Shaitaan came to me when I had drunk my share and said: 'Muhammad (ﷺ) has gone to the Ansâr and they are offering him hospitality, and he will have with them something that will leave him in no need of this draught (of milk).' So I went and drank it, and when it had penetrated deeply into my stomach and I realized that it was too late, the Shaitaan made me regret it and he said: 'Woe to you, what have you done? Have you drunk the drink of Muhammad (ﷺ)? He (ﷺ) will come and will not find it, then he will pray against you and you will be doomed, and you will be a loser in this world and in the Hereafter.' I had a sheet over me; if I covered my feet with it my head was exposed, and if I covered my head with it my feet were exposed. I could not sleep, but my two companions had gone to sleep and they had not done what I had done. The Prophet (ﷺ) came and said Salaam as he (ﷺ) usually did, then he (ﷺ) went to the Masjid and prayed. Then he came to his drink and uncovered it, and he (ﷺ) did not find anything in it. He (ﷺ) looked up at the sky and I said: 'Now he (ﷺ) is praying against me and I am doomed.' But he (ﷺ) said:

I wrapped the blanket tightly around me and I took a knife and went to the goats, to see which of them was the fattest so that I could slaughter it for the Messenger of Allah (ﷺ), but its udder was full of milk, and they all had udders full of milk. I went to a vessel that belonged to the family of Muhammad (ﷺ), that they used for milking, and I milked (the goat) into it until it filled with foam, and I brought it to the Messenger of Allah (ﷺ). He (ﷺ) said: 'Did you have your drinks tonight?' I said: 'O Messenger of Allah (ﷺ), drink.' He (ﷺ) drank and handed it back to me. I said: 'O Messenger of Allah (ﷺ), drink.' He (ﷺ) drank then handed it back to me. When I realized that the Prophet had drunk his fill and I had earned the blessing (of his supplication), I laughed so much that I fell to the ground. The Prophet (ﷺ) said: 'Have you been up to no good, O Miqdâd?' I said: 'O Messenger of Allah, what happened is such-and-such and I did such-and-such.' The Prophet (ﷺ) said: 'This is nothing but a mercy from Allah, Glorified and Exalted is He. Why didn't you tell me so that we could have woken our two companions and they could have had some?' I said: 'By the One Who has sent you (ﷺ) with the truth, if you (ﷺ) get your share, and I get some with you (ﷺ), I would not care whoever else gets some."

TRANSLATION:
O Allah, feed those who have fed me and give drink to those who have given me to drink.

Narrated: 'Abdullâh bin Busr
"The Messenger of Allah (ﷺ) came to my father and we offered him some food and some Watbah (A mixture of dates, dried cottage cheese, and cooking fat). Then some dates were brought and he started eating them, putting the stones between his fingers and holding his forefinger and middle finger together" - Shu'bah said: "I think we learn from this that one may hold the date stones between two fingers, In shâ Allah" - "Then some drink was brought and he drank it, then he passed it to the
one who was on his right. My father said, taking hold of the reins of his riding-animal: 'Pray to Allah for us.' He said:

TRANSLATION:
O Allah, bless them in that which You have provided for them, and forgive them and have mercy on them.

PROPHET MUHAMMAD (ﷺ) said:
When one of you eats food, then let him say:

TRANSLATION:
In the Name of Allah.

Narrated: Marwan ibn Salim al-Muqaffa'
The Prophet (ﷺ) used to say, when breaking his fast:

TRANSLATION:
The thirst is gone, and the veins are quenched, and the reward is assured - if Allah wills.

Narrated: Anas (ra)
Prophet came to Sa'd bin 'Ubädah and he brought some bread and olive oil and he ate, then the Prophet (ﷺ) said:

TRANSLATION:
1) May fasting people break their fast with you,
2) May the righteous eat your food, and
3) May the angels send blessings upon you.