I intended to go (on expedition) to Khaybar. So I came to the Holy Prophet ﷺ, greeted him and said: I am intending to go to Khaybar. He said: When you come to my agent, you should take from him fifteen wasqs (of dates). If he asks you for a sign, then place your hand on his collar-bone.  

أَرَدْتُ الْخُرُوجَ إِلَى خَيْبَرَ فَأَتَيْتُ رَسُولَ اللَّهِ ﷺ فَسَلَّمْتُ عَلَيْهِ وَقُلْتُ لَهُ إِنِّي أَرَدْتُ الْخُرُوجَ إِلَى خَيْبَرَ فَقَالَ إِذَا أَتَيْتَ وَكِيلِي فَخُذْ مِنْهُ خَمْسَةَ عَشَرَ وَسْقًا فَإِنِ ابْتَغَى مِنْكَ آيَةً فَضَعْ يَدَكَ عَلَى تَرْقُوَتِهِ  

I intended to go (on expedition) to Khaybar. So I came to the Holy Prophet ﷺ, greeted him and said: I am intending to go to Khaybar. He said: When you come to my agent, you should take from him fifteen wasqs (of dates). If he asks you for a sign, then place your hand on his collar-bone. (Using translation from Abū Dāʾūd 3632)   

أَرَدْتُ الْخُرُوجَ إِلَى خَيْبَرَ فَأَتَيْتُ النَّبِيَّ ﷺ فَسَلَّمْتُ عَلَيْهِ وَقُلْتُ إِنِّي أَرَدْتُ الْخُرُوجَ إِلَى خَيْبَرَ فَقَالَ إِذَا أَتَيْتَ وَكِيلِي فَخُذْ مِنْهُ خَمْسَةَ عَشَرَ وَسْقًا؛ فَإِنِ ابْتَغَى مِنْكَ آيَةً فَضَعْ يَدَكَ عَلَى تَرْقُوَتِهِ  

" ("إذَا لَقيتَ وكيلى فخُذْ مِنْهُ خمسةَ عشرَ وَسْقًا، فإِن ابتَغَى منك آيةً فضعْ يدكَ على تَرْقُوَتِكَ".