The Messenger of Allah ﷺ sent us along with a contingent, and said: If you find so-and-so. He then narrated the rest of the tradition to the same effect.
بَعَثَنَا رَسُولُ اللَّهِ ﷺ فِي بَعْثٍ فَقَالَ إِنْ وَجَدْتُمْ فُلاَنًا وَفُلاَنًا فَذَكَرَ مَعْنَاهُ