Hawzah News Agency – The merciful prophet of Islam (pbuh) says:

تَهادَوا تَحابُّوا، تَهادُوا فإنَّها تَذهَبُ بِالضَّغائنِ .

'Give gifts to each other and you will love each other; give gifts to each other for it removes grudges.'

Source: al-Kafi, v. 5, p. 144, no. 14