Hisnul Muslim 202

To the debtor when his debt is settled

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

Baarakallaahu laka fee 'ahlika wa maalika, 'innamaa jazaa'us-salafil-hamdu wal'adaa'.

May Allah bless you in your family and your wealth, surely the reward for a loan is praise and returning (what was borrowed).