اللَّهُمَّ بَارِكْ لَنَا فِيهِ وَزِدْنَا مِنْهُ
Transliteration
Allahumma barik lana fihi wa zidna minh
English meaning
O Allah, bless it for us and give us more of it.
When is it recited?
Recited after drinking milk.
Its virtue
Milk has a special blessing supplication since it serves as both food and drink.
Source
Tirmidhi, Da'awat 54, 3455