Sayyidina Ibn Umar (RA) reported that Allah’s Messenger (SAW) said: ‘Indeed, your appointed time relative to the people who have passed away is like between the salah of asr and the setting of the sun. And, your example relative to the Jews and Christians is like a man who hired many labourers asking, “Who will work for me till afternoon against a qirat.” The Jews worked against one qirat. Then he asked, “Who will work for me from afternoon on against a qirat”? The Christians worked against one qirat. Then you work from the salah of Asr to the setting of the sun against two qirats. So, the Jews and the Christians became angry and said, “We work more but are paid less.” He asked “Have I wornged you and denied anything of your right”? They said, “No.” He said, “This is my favour. I grant it to whom I will.”
[Ahmed 5909,Bukhari 557]