Mu'adh bin Afra' (may Allah be pleased with him) performed tawaf of the House of Allah after Asr and did not pray. A man of Quraysh named Mu'adh said to him: Why did you not pray? He said: The Prophet (peace and blessings be upon him) forbade praying after the two prayers (Asr and Fajr): after Asr until the sun sets, and after Fajr until the sun rises.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4429