Invocation (upon receipt of the loan) for someone who lends you money

بارَكَ اللَّهُ لَكَ فِي أَهْلِكَ وَمَالِكَ، إِنَّمَا جَزَاءُ السَّلَفِ الْحَمْدُ وَالأَدَاءُ

Braka llāhu laka fī ahlika wa mālika, innamā jazāʾu as-salafi l-ḥamdu wa-l-ʾadāʾ

May Allah bless for you, your family and wealth. Surely commendation and payment are the reward for a loan.