And inform them that the water is shared between them, each [day of] drink attended [by turn].
Sahih International
وَنَبِّئْهُمْ
wanabbi'hum
And inform them
Word breakdown
و
Harf · Conjunctionand
نبئْ
Fi'l · VerbAnd inform them
to inform, give news; prophet, prophecy
160× in the Quran · Common
هُمْ
Ism · Personal pronounthem/their
Grammar rules
وَنَبِّئْهُمْ (And inform them) is a command — it's telling someone to do something.
We translate it as a direct command — "[Do this]!"
Lesson 10 · Commands & Futureوَنَبِّئْهُمْ (And inform them) uses form II (فَعَّلَ) — the middle letter is doubled, which makes the meaning stronger or causative.
The meaning is more intense than the basic form, or means "to make someone do [action]".
Lesson 12 · Verb Families II–IVوَنَبِّئْهُمْ (And inform them) starts with وَ, the most common Arabic word — it means "and".
We add "and" to connect this to what came before.
Lesson 4 · Particles