"And if We had not strengthened you" meaning: protected you, "you would have almost inclined toward them a little bit."
﴿وَلَوْلَا أَن ثَبَّتْنَاك﴾ عَصَمْنَاكَ ﴿لَقَدْ كِدْتَ تَرْكَنُ إِلَيْهِمْ شَيْئا قَلِيلا﴾