Is it permissible to give charity to an uncle who has no financial income but gambles on horses?

A paternal uncle's betting on horses is permissible. Even if it is assumed that the uncle places a forbidden bet or engages in other reprehensible acts, there is no harm in giving him charity and maintaining kinship ties with him; perhaps Allah will enrich him from his unlawful earnings, as stated in the hadith of the man who gave charity to a thief, a prostitute, and a wealthy person, and it was said to him: "As for your charity to a thief, perhaps he will refrain from his stealing; and as for the prostitute, perhaps she will refrain from her fornication; and as for the wealthy person, perhaps he will take heed and spend from what Allah has given him."