Whenever Krishna wants some service from you or begs something from you, it does not mean that He is in need of it. He is not in need of it. But He is in need of your love because you have forgotten how to love God, how to love Krishna. That He is practiced.
There is a story that some sannyasi went to a householder, because a sannyasi goes to householder for begging. They are begging also like that. They are not beggars, but they introduce as beggar so that the householder may receive and take some advantage of his knowledge. He is not beggar. So one beggar went to a householder, and the housewife said, “Oh, this beggar has come from door to door. Give him some ashes.” So the sannyasi replied, “All right. Give me some ashes. Just begin your charity.” Just begin your charity.
So similarly, Krishna, when He wants, “Give Me a little flower, a little fruit, a little water,” it does not mean that He is begging. He is just inducing me to the practice of offering everything which belongs to Krishna.
Reference: Srimad-Bhagavatam 7.9.11 – Montreal, August 17, 1968
courtesy;- https://www.srilaprabhupadalila.org/read/SPFSTR_0629