23سُنَّةَ اللَّهِ الَّتي قَد خَلَت مِن قَبلُ ۖ وَلَن تَجِدَ لِسُنَّةِ اللَّهِ تَبديلًاLaleh BakhtiarThis is a custom of God which was, surely, in force before. Thou wilt never find in a custom of God any substitution.