Sedakasutta

sn47.19:2.1 That’s the way,” said the Buddha. “It’s just as Medakathālikā said to her tutor.

sn47.19:2.2 Thinking ‘I’ll look after myself,’ you should cultivate mindfulness meditation.

sn47.19:2.3 Thinking ‘I’ll look after others,’ you should cultivate mindfulness meditation.

sn47.19:2.4 Looking after yourself, you look after others; and looking after others, you look after yourself.