91. To the debtor when his debt is settled
الدعاء لمن أقرض عند القضاء
بارَكَ اللهُ لَكَ في أَهْلِكَ وَمالِك، إِنَّما جَـزاءُ السَّلَفِ الْحَمْدُ والأَداء
Bārakallāhu laka fī ahlika wa mālik, innamā jazā'us-salafi ‘l-ḥamdu wa‘l-adā'.
May Allah bless you in your family and your wealth, surely the reward for a loan is praise and returning (what was borrowed).
Source: An-Nasa'i, 'Amalul-Yawm wal-Laylahp. 300, Ibn Majah 2/809. See also Al-Albani, Sahih Ibn Majah2/55.