The Buddha explains the four bases of a supportive relationship.

Saṅgaha sutta - Supportive

"Bhikkhus, there are these four bases of a supportive relationship. What four? Giving, kind speech, beneficial action, and impartiality.

These are the four bases of a supportive relationship.

"Giving, kind speech, beneficial action, and impartiality; In diverse worldly conditions, as is appropriate in each case; These are the bases of supportive relationships in the world, like the linchpin of a rolling chariot.
Without these bases of supportive relationships, neither mother nor father; would be able to obtain esteem and veneration from their children.
But since these means of being supportive exist, wise people respect them; thus they experience distinction, and are highly praised."