جامع الترمذي

Ismail bin Ibrahim (a narrator in the chain of Hadith no. 314) said: "I met Abdullah bin al Husain in Makkah, so I asked him about this Hadith, so he narrated it to me, he said: 'When Allah's Messenger (ﷺ) entered, he said (Rabbi aftahli abwaba rahmatik) 'O Lord, open the gates of Your mercy for me.' And when he exited he said: (Rabbi iftahli abwaba fadlik) 'O Lord, open the gates of Your blessings for me.'"