They said this while they themselves might also know that...
They said this while they themselves might also know that all the Divine messengers in the length of history were from the generation of Adam including Abraham (as), whom all knew as a prophet, surely were human beings. Moreover, can anything ever understand the men’s needs, difficulties and pains save a human being?
That why the significant attribute of Allah’s mercifulness is emphasized on, it may be from this point that, by narrating their statement, because: how is it possible for Allah, Whose general Mercy has been spread throughout the world, He does not send some messengers for training people and for inviting human beings to rectitude and development? However, these prophets were not hopeless from the severe opposition of that misguided people and did not let any weakness and debility come to them.
Their answer to them was as follows: “They (the messengers) said: ‘Our Lord knows that we have been sent to you.” “And our duty is only to deliver the clear Message’.” Certainly the messengers of Allah did not suffice to mere claiming, and to only oath, but, as it is understood from the Qur’anic sentence /balaq un mubin/ (the clear Message), they showed some miracles and proofs from themselves, else their message, as an expansion of the Clear Message, must be in such a manner that it conveys the reality to all, and this is not possible but by the help of some firm proofs and clear godly miracles.
“(The pagans told the prophets:) ‘For us, we augur an evil omen from you, if you do not desist, we will certainly stone you, and there shall certainly afflict you a painful chastisement from us’.” 19. “They said: ‘your evil omens are with yourselves, (should you augur a bad omen) if you are admonished?