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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."