Al-Kāfi - Volume 5 > Detestability of Using the Labor of a Worker before Agreeing on Wages and Delay Payment of His Wages
Hadith #3

3- مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ إِسْمَاعِيلَ عَنْ حَنَانٍ عَنْ شُعَيْبٍ قَالَ تَكَارَيْنَا لأبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَوْماً يَعْمَلُونَ فِي بُسْتَانٍ لَهُ وَكَانَ أَجَلُهُمْ إِلَى الْعَصْرِ فَلَمَّا فَرَغُوا قَالَ لِمُعَتِّبٍ أَعْطِهِمْ أُجُورَهُمْ قَبْلَ أَنْ يَجِفَّ عَرَقُهُمْ.

3. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn ‘Isma’il from Hanan from Shu’ayb who has said the following: “We once hired a people for abu ‘Abd Allah, ‘Alayhi al-Salam, to work in his garden and they were suppose to work until the time of al-‘Al-‘Asr. When they finished, he (the Imam) said to Mu‘attib, ‘Pay them their wages before their perspiration dries up.’”