It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that he heard the Messenger of Allah (peace and blessings be upon him) say while on the pulpit: "Your time compared with the times that have passed is like the time between the Asr prayer and the Maghrib prayer. The people of the Torah were given the Torah, and they acted upon it until midday; then they became unable, so they were given one qirat each. The people of the Injil were given the Injil, and they acted upon it until the Asr prayer; then they became unable, so they were given one qirat each. Then you were given the Qur'an, and you acted upon it until Maghrib, so you were given two qirats each. The people of the Torah and the people of the Injil said: 'Our Lord, You have given these less work and more reward.' Allah Almighty said: 'Have I reduced anything of your reward?' They said: 'No.' Allah Almighty said: 'This is My bounty; I give it to whomever I will.'"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب المساقاة / 11645