Srimad Bhagavatham : 5.3.6.




O Supreme Lord, You are full in every respect. You are certainly very
satisfied when Your devotees offer You prayers with faltering voices and in
ecstasy bring You tulasé leaves, water, twigs bearing new leaves, and newly
grown grass. This surely makes You satisfied.

One does not need great wealth, education or opulence to satisfy the
Supreme Personality of Godhead. If one is fully absorbed in love and ecstasy,
he need offer only a flower and a little water. As stated in Bhagavad-gétä,
patraà puñpaà phalaà toyaà yo me bhaktyä prayacchati: "If one offers Me with
love and devotion a leaf, a flower. fruit or water, I will accept it." (Bg. 9.26)
The Supreme Lord can be pleased only by devotional service: therefore it is
said here that the Lord is surely satisfied by devotion and nothing else.
Quoting from the Gautaméya-tantra, the Hari-bhakti-viläsa states: 
"Sri Krishna, who is very affectionate toward His devotees, sells Himself to a
devotee who offers merely a tulasi leaf and a palmful of water." The Supreme
Lord is causelessly merciful upon His devotee, so much so that even the poorest
of men can offer Him a little water and a flower in devotion and thus please
Him. This is due to His affectionate dealings with His devotees.