وَإِن جَادَلُوكَ فَقُلِ اللَّهُ أَعْلَمُ بِمَا تَعْمَلُونَ
[22:68]
And if they contend with you, say: Allah best knows what you do.
If they do wrangle with thee, say, "Allah knows best what it is ye are doing."
And if they wrangle with thee, say: Allah is Best Aware of what ye do.