Belief in the Angels - , Dought & clear - , There are no angels or other creatures who know everything in the heavens and on earth.

My daughter asked me: who is the angel who knows everything in the
heavens and the earth, the number of drops of water, the number of
grains of sand? Is there any such thing?.
Praise be to Allaah.
The one who knows everything in the heavens and on earth, and knows
the number of drops of water and the number of grains of sand, is
Allah, the Lord ofthe Worlds. There is no angel who is close to Him or
any Prophet was sent who knows that. Anyone who says that there is
anyone among the angels who knows all of that has fabricated a lie
against Allah, to Whom belongs knowledge of the unseen of the heavens
and the earth.
Allah, may He be exalted,says (interpretation of the meaning):
"And with Him are the keys of the Ghaib (all that is hidden), none
knows them but He. And He knows whatever there is in (or on) the earth
and in the sea; not a leaf falls, but he knowsit. There is not a grain
in the darkness of the earth nor anything freshor dry, but is written
in aClear Record"
[al-An'aam 6:59].
And He, may He be glorified, says (interpretation of the meaning):
"Say: None in the heavens and the earth knows the Ghaib (unseen)
except Allah, nor can they perceive when they shall be resurrected"
[an-Naml 27:65].
Ibn Katheer (may Allah have mercy on him) said:
Here Allah, may He be exalted, is instructing HisMessenger (blessings
and peace of Allah be upon him) to tell all of mankind that no one
knows the unseen except Allah, may He be glorified and exalted, and
that He alone has that knowledge, with nopartner or associate.
End quote from Tafseer Ibn Katheer, 6/207
Al-Bukhaari (4697) narrated from Ibn 'Umar (may Allah be pleased with
him) that the Messenger of Allah (blessings and peace of Allah be upon
him) said: "The keys of the Unknown are five, whichno one knows except
Allaah: no one knows what will happen tomorrow except Allaah; no one
knows what is in the wombs except Allaah; no one knows when it will
rain except Allaah; no one knows in which land he will die; and no one
knows whenthe Hour will begin except Allaah."
But Allah, may He be exalted, may inform whomever He wills among His
creation about whatever He wills of His unseen. Allah, may He be
exalted, says (interpretation of the meaning):
"(He Alone) the All-Knower of the Ghaib (unseen), and He reveals to
none His Ghaib (unseen).
Except to a Messenger (from mankind) whom He has chosen (He informs
him of unseen as much as He likes), andthen He makes a band ofwatching
guards (angels) to march beforehim and behind him."
[al-Jinn 72:26, 27].
The scholars of the Standing Committee said:
Knowledge of unseen matters is something that belongs exclusively to
Allah, so no one among His creation, human or jinn, knows anything of
it except what Allah reveals to whomever He wills among His Angels or
His Messengers.
End quote from Fataawa al-Lajnah ad-Daa'imah, 1/346
Yes, there is one of the angels who is appointedin charge of the rain,
and directs it wherever Allah ills; he is Mikaa'eel (peace be upon
him), who has helpers who dowhatever he instructs them to do. But that
onlyhappens by the will of Allah and in accordance with His wisdom and
knowledge. They do not know anything or do anything; rather they
cannot do anything at allexcept by Allah's leave. Moreover, that does
not mean that they know the number of drops of water, because their
knowledge is restricted to what Allah has taught them, and they say,
as Allah tells us:
"Glory be to You, we have no knowledge except what you have taught us.
Verily, it is You, the All-Knower, the All-Wise"