The heart lied not in what he saw.
The mind never made up what it saw.
His heart did not lie of what he saw
The heart was not untrue in seeing what he saw
The heart did not lie/falsify what he/it saw/understood
The Mohammad’s mind did not make what he saw up
The heart did not deny, what it saw. (The Holy Prophet was bestowed with seeing Allah – see also preceding verses 8,9, 10 .
The heart of the Prophet lied not in seeing what he saw
(His) heart did not take it contrary to what (his) eyes beheld
Whose mind made no mistake in (the interpretation of) that which he saw (during the ascansion)
The (Prophets) heart lied not (in seeing) what he (Muhammad SAW) saw