Be beneficial to all creatures
The Prophet (peace and blessings be upon him) is reported to have said, “Whenever Muslims plant a tree, they will earn the reward of charity because of the food that comes from it; and likewise what is stolen from it, what the wild beasts eat out of it, what the birds eat out of it, and what people take from it is charity for them” (Muslim).
The Prophet (peace and blessings be upon him) is also reported to have said, “Muslims will always earn the reward of charity for planting a tree, sowing a crop and then birds, humans, and animals eat from it” (Al-Bukhari and Muslim).
Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said, “Charity is due upon every joint of the people for every day upon which the sun rises; being just between two people is charity; and helping a man with his animal and lifting his luggage upon it is charity; and a kind word is charity; and every step that you take towards the mosque is charity; and removing harmful things from the road is charity.”
[Sahih Muslim, Book 5, Number 2204]
A Good Word is Charity
“A good word is a charitable act.”
the Prophet (peace and blessings be upon him) said:
“Whoever believes in Allah and the Last Day should speak good things or keep silent.”
A smile is Charity
The Prophet (peace be upon him) said: “When you smile to your brother’s face, it is charity.”
This is an authentic hadîth. It is related in Sunan al-Tirmidhî (1879)