Allah said to Moosa: “O Moosa, I did not grant that to Myself so how could I grant it yo you?”

Moosa (peace be upon him) said when conversing with his Lord: "O Lord,
protect mefrom people's tongues (speech)" He said: "O Moosa, you are
asking for something that I did not (even) grant for Myself.".
Praise be to Allaah.
We could not find this report with any reliable isnaad, and we did not
find it in the books of Sunnah and reports. Rather we saw it in
somebooks of raqaa'iq (heart softening reports) and exhortation,
without mentioning any isnaad or reliable source.
Ibn Muflih al-Maqdisi (may Allah have mercy on him) said:
"Moosa (blessings of Allah be upon him) said: 'O Lord, the people are
saying things about me that are not true.' And Allah revealed to him:
'O Moosa, I have not granted that to Myself, so how could I grant it
to you?'" End quote.
Al-Adaab al-Shar'iyyah, 1/7-8; there is a similar report in Qoot
al-Quloob by Abu Taalib al-Makki, 2/309; Siraaj al-Mulook by Abu Bakr
al-Tartooshi (229).
Although we cannot prove it because we could not find any isnaad for
it, there does not appear to be anything wrong with its meaning,
because Allah did not decree -- in any of the universal natural laws
that He decreed -- that none of His creationwould overstep the mark
towards Him or that any human could ever deal with their Lordin a way
that is not befitting to His Majesty and Might; rather He has told us
of people who fell short in that regard and did not estimate Him with
an estimation due to Him, as He says (interpretation of the meaning):
"They (the Jews, Qurayshpagans, idolaters) did not estimate Allaah
with an estimation due to Him when they said: 'Nothing did Allaah send
down to any human being (by Revelation).' Say (O Muhammad صلىالله عليه
وسلم): "Whothen sent down the Book which Moosa (Moses) brought, a
light and a guidance to mankind which you (the Jews) have made into
(separate) paper sheets, disclosing (some of it) and concealing
(much). And you (believers in Allaah and His MessengerMuhammad صلى
الله عليه وسلم) were taught (through the Qur'aan) that which neither
you nor your fathers knew." Say: "Allaah (sent it down)." Then leave
them to play in their vain discussions"
[al-An'aam 6:91]
"They have not estimated Allaah His Rightful Estimate. Verily, Allaah
is All-Strong, All-Mighty"
[al-Hajj 22:74]
"They made not a just estimate of Allaah such as is due to Him. And on
the Day of Resurrection the whole of the earth will be grasped by His
Hand and the heavens will be rolled up in His Right Hand. Glorified be
He, and High be He above all that they associate as partners with
Him!"
[al-Zumar 39:67].
The Prophet (blessings and peace of Allah be upon him) said: "No one
is more patient in bearing offensive things that he hears than Allaah,
may He be glorified and exalted; others are associated with Him, a son
is attributed to Him, but Hestill grants them health and provision."
Narratedby al-Bukhaari (7378) and Muslim (2804).
What we learn from thatis that the criticism of the envious and the
slander of those with ulterior motives is not a reason for a Muslim to
be discouraged from trying hard to succeed and progress, or to weaken
his resolve or cause him to become frustrated. He should always
remember that Allah, may He be glorified and exalted, the Angels, the
Messengers and the Prophets were never safe from slander and harm.
And Allah knows best.