It is narrated from Al-Ala bin Abd al-Rahman that we came to Anas bin Malik (may Allah be pleased with him) after Zuhr and he was offering the Asr prayer. When he had finished the prayer, we mentioned offering the prayer early, or he himself raised it, and then he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "That is the prayer of the hypocrites (he said it three times). One of them sits (waiting) until, when the sun turns yellow and it is between the two horns of Satan, or upon the two horns of Satan, he gets up and pecks out four, and in them he remembers Allah only very little."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2089