بِسْمِ اللَّهِ. بِسْمِ اللَّهِ فِي أَوَّلِهِ وَآخِرِهِ
Bismillah. bismillahi fi awwalihi wa akhirih
In the name of Allah. — In the name of Allah at its beginning and at its end.
Say the first before eating; if you forgot at the start, say the second when you remember.
Source Jāmiʿ at-Tirmidhī 1858 Ṣaḥīḥ · Sunan Abī Dāwūd 3767 (similar wording) Ṣaḥīḥ
Compiler cites Abū Dāwūd 3/347; at-Tirmidhī 4/288; see al-Albānī, Ṣaḥīḥ at-Tirmidhī 2/167
اللَّهُمَّ بَارِكْ لَنَا فِيهِ، وَأَطْعِمْنَا خَيْرًا مِنْهُ. اللَّهُمَّ بَارِكْ لَنَا فِيهِ، وَزِدْنَا مِنْهُ
Allahumma barik lana fih, wa at'imna khayran minhu. Allahumma barik lana fih, wazidna minhu
O Allah, bless it for us and feed us with something better than it. — O Allah, bless it for us and give us more of it.
The first is said when Allah gives one food; the second when He gives one milk to drink.
Source Jāmiʿ at-Tirmidhī 3455 Ḥasan · Sunan Abī Dāwūd 3730 Ḥasan
Compiler cites at-Tirmidhī 5/506; see al-Albānī, Ṣaḥīḥ at-Tirmidhī 3/158