When Launcelot Gobbo's father, Old Gobbo, a servant just as Launcelot is, comes to visit, he brings a basket in which he has placed a "dish of doves" as a present for Shylock.
Gobbo is partially blind, so he comically fails to discern he is talking to his son. Also, when he feels the back of his son's head, he thinks he is feeling Launcelot's beard. When Launcelot finally convinces Gobbo that he really is his son, Launcelot doesn't want his father to give the doves to Shylock. He says he is hungry himself from Shylock not feeding him enough:
I am famished in his service. You may tell every finger I have with my ribs. Father, I am glad you are come.
Launcelot urges his father to give the doves to Bassanio. Launcelot is hoping to leave Shylock's service to work for Bassanio and believes the gift will help smooth the way. Therefore, the gift is diverted to Bassanio.