“What money is better bestowed than that of a schoolboy's tip? How the kindness is recalled by the recipient in after days! It blesses him that gives and him that takes.”

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 4, hadith number 634
Sunni Hadith

in Confidences of an artist (1894) published posthumously in Paris in 1922 as part of the book of memoirs To himself; as quoted by Paul Westheim in Confessions of Artists - Letters, Memoirs and Observations of Contemporary Artists, Propyläen Publishing House, Berlin, 1925: p. 82

The Doll

This quotation has been misattributed to Laozi; its origin is actually unknown (see "give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime" on Wiktionary). This quotation has also been misattributed to Confucius and Guan Zhong.
Misattributed

Nahj al-Balagha

Muwatta of Imam Malik, Book of Sadaqa, hadith 10 http://ahadith.co.uk/permalink-hadith-4938 <br class="br">Sunni Hadith

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 4, hadith number 593
Sunni Hadith
Variant: Al-Hasan ibn 'Ali said, "I memorised from the Messenger of Allah, may Allah bless him and grant him peace, 'Leave what gives you doubt for what gives you no doubt.'"

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 7, hadith number 1288
Sunni Hadith

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 4, hadith number 633
Sunni Hadith
Variant: Anas reported that the Prophet, may Allah bless him and grant him peace, said, "O Allah, there is no life but the life of the Next World."