وَتَأْخِيرُ الْعَصْرِ مَا لَمْ تَتَغَيَّرِ الشَّمْسُ، وَتَعْجِيلُ الْمَغْرِبِ
Translation: It is recommended to delay Asr so long as the sun has not noticeably changed, and to perform Maghrib promptly.
This does not recommend postponing Asr all the way to sunset: the preference is limited to before the sun visibly changes. Maghrib, by contrast, is preferably performed promptly.