22:68
وَإِن جَـٰدَلُوكَ فَقُلِ ٱللَّهُ أَعْلَمُ بِمَا تَعْمَلُونَ
wa-in jādalūka faquli l-lahu aʿlamu bimā taʿmalūna
and if they argue with you, say, ‘God is well aware of what you are doing.’
And if they argue with you (as regards the slaughtering of the sacrifices), say "Allâh knows best of what you do.