Musannaf Ibn Abi Shaybah 31752 — What a man says in supplication while

Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) said to me: "When you enter the Sacred Mosque, send greetings of peace upon the Prophet (peace and blessings be upon him) and recite this supplication: 'O Allah, open for me the doors of Your mercy.' And when you leave, send greetings of peace upon the Prophet (peace and blessings be upon him) and recite this supplication: 'O Allah, protect me from the accursed Satan.'"