"And those who, when oppression strikes them" — meaning when the polytheists committed oppression against them and wronged them — "they defend themselves" — with their tongues, for they had not yet been commanded to fight them on that day.
Interpretation of Surah Ash-Shura from verse 40 to verse 44.
﴿وَالَّذين إِذا أَصَابَهُم الْبَغي﴾ إِذا بغى عَلَيْهِم الْمُشْركُونَ فظلموهم ﴿هم ينتصرون﴾ بألسنتهم لم يَكُونُوا أمروا بقتالهم يَوْمئِذٍ.
تَفْسِير سُورَة الشورى من الْآيَة ٤٠ إِلَى آيَة ٤٤.