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

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

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

An-Nasa'i, 'Amalul-Yawm wal-Laylahp. 300, Ibn Majah 2/809. See also Al-Albani, Sahih Ibn Majah2/55.