Imam Ja‘far al-Ṣadiq (as): A man came to the Prophet (SAWA) and said, 'O Messenger of Allah, whom shall I be good to?' He said, 'Your mother.' He asked, 'Then who?' He (SAWA) said, 'Your mother.' He asked, 'Then who?' He (SAWA) said, 'Your mother.' He said, 'And then who?' He (SAWA) replied, 'Your father.' al-Kāfī