(4) بَابُ إِذَا اسْتَأْجَرَ أَجِيرًا لِيَعْمَلَ لَهُ بَعْدَ ثَلاَثَةِ أَيَّامٍ أَوْ بَعْدَ شَهْرٍ أَوْ بَعْدَ سَنَةٍ جَازَ، وَهُمَا عَلَى شَرْطِهِمَا الَّذِي اشْتَرَطَاهُ إِذَا جَاءَ الأَجَلُ
Narrated Aisha:
(the wife of the Prophet) Allah's Messenger (ﷺ) and Abu Bakr hired a man from the tribe of Bani-Ad-Dil as an expert guide who was a pagan (follower of the religion of the pagans of Quraish). The Prophet (ﷺ) and Abu Bakr gave him their two riding camels and took a promise from him to bring their riding camels in the morning of the third day to the Cave of Thaur.
Reference: Sahih al-Bukhari 2264
In-book reference: Book 37, Hadith 5
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 36, Hadith 465