Protection and help: If someone is in real danger, provide responsible assistance within one’s ability and lawful safety boundaries; do not support a request that violates another person’s rights.
Requests and invitations: Offer help where appropriate and feasible, and respond considerately to invitations. Explain an inability or legitimate excuse courteously.
Returning kindness: Thank a person who helped during difficulty, assist them in turn, or offer an appropriate gift when possible. If unable to repay materially, pray sincerely for them.
فَكَافِئُوهُ teaches appreciation through suitable action, not merely courteous words.