“O Allah, help me to remember You, to give thanks to You, and to worship You in the best manner.”

Mu‘ādh ibn Jabal (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) took his hand and said: "O Mu‘ādh, by Allah, I do love you," and he added: "I advise you, O Mu‘ādh, never fail to say after each prayer: Allāhumma a‘inni ‘ala dhikrika wa shukrika wa husni ‘ibādatik (O Allah, help me remember You, thank You, and excellently worship You)."

Narrated by Mu‘adh ibn Jabal, recorded by Abu Dawud, an-Nasa’i and Ahmad — and the setting is part of it. The Prophet (peace be upon him) took Mu‘adh by the hand and told him, “By Allah, I love you,” and then gave him this to say after every prayer. The three things asked for are the three that cannot be produced by resolve alone: remembering, thanking, and worshipping well.