Ayman, the freed slave of Ibn Abi Amrah, said: I came to Sayyidah Aishah (may Allah be pleased with her). I was a slave in those days; this was before I was freed. I said to her: "O Mother of the Believers! At which hour did the Prophet (peace and blessings be upon him) pray the most?" Sayyidah Aishah (may Allah be pleased with her) said: "When it was time for the sun to decline, until it had declined."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Abdullah bin Muslim bin Hurmuz, who is da'if (weak).