It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Do not intend to pray at the time of sunrise or sunset."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5301
Hadith Gradingحکم دارالسلام:إسناده صحيح ، خ : 585، م : 828 .