Invocation for someone who offers you a share of
his wealth
بارَكَ اللهُ لَكَ في أَهْلِكَ وَمالِكَ.
201. Baarakallaahu laka fee 'ahlika wa maalika.
May
Allah bless you in your family and your property.
Reference: Al-Bukhari,
cf. Al-Asqalani, Fathul-BAri 4/88.