So do not weaken and call for peace while you are superior; (47:35)

Almuntakhab Fi Tafsir Alquran Alkarim

Therefore do not weaken in power or in strength of purpose nor be tempted to invite your enemy to peace when you are in control of the situation and you have the upper hand. Remember that Allah stands by you to protect you and defend you, and He will not reduce or annul the value of your efforts

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(47:35) So, be not faint-hearted and do not cry for peace. *41 You shall prevail. Allah is with you and will not bring your works to nought.

So do not weaken and call for peace while you are superior; meaning

*41) Here, one should bear in mind the fact that when this discourse was revealed only a handful of the Muslims consisting of a couple of hundreds of the Muhajirin and Ansar living in the small town of Madinah were upholding the standard of Islam and they were not only faced by the powerful Quraish but also by the whole of pagan Arabia. Such were the conditions when they were exhorted 'not to be faint-hearted and not to beg (the enemy) for peace", but to make preparations for the decisive conflict. This does not mean that the Muslims should never negotiate for peace, but it means that in a state like this it is not right to initiate peace negotiations when it shows the Muslims' weakness, for it will still further embolden the enemy. The Muslims should first establish their superiority in power and strength; then if they negotiate peace there will be no harm.
 

So do not weaken and call for peace while you are superior; meaning in Urdu

پس تم بودے نہ بنو اور صلح کی درخواست نہ کرو تم ہی غالب رہنے والے ہو اللہ تمہارے ساتھ ہے اور تمہارے اعمال کو وہ ہرگز ضائع نہ کرے گا