قَالَ رَبِّ احْكُم بِالْحَقِّ
...
He said: "My Lord! Judge You in truth!
means, judge between us and our people who disbelieve in the truth.
Qatadah said:
"The Prophets (peace be upon them) used to say:
رَبَّنَا افْتَحْ بَيْنَنَا وَبَيْنَ قَوْمِنَا بِالْحَقِّ وَأَنتَ خَيْرُ الْفَـتِحِينَ
"Our Lord! Judge between us and our people in truth, for You are the Best of those who give judgment." (7:89),
and the Messenger of Allah was commanded to say this too."
It was reported from Malik from Zayd bin Aslam that;
when the Messenger of Allah witnessed any fighting, he would say:
رَبِّ احْكُم بِالْحَقِّ
"My Lord! Judge You in truth!"
...
وَرَبُّنَا الرَّحْمَنُ الْمُسْتَعَانُ عَلَى مَا تَصِفُونَ
Our Lord is the Most Gracious, Whose help is to be sought against that which you attribute!
means, `against the various lies and fabrications that you utter, some of which are worse than others;
Allah is the One Whose Help we seek against that.'
This is the end of the Tafsir of Surah Al-Anbiya'. To Allah be praise and blessings.