He who takes an oath in the course of which he says: By Lat (and al-'Uzza), he should say: There is no god but Allah; and that if anyone says to his friend:" Come and I will gamble with you," he should pay sadaqa. (Using translation from Muslim 1647a)  

قَالَ رَسُولُ اللهِ ﷺ مَنْ حَلَفَ مِنْكُمْ فَقَالَ بِاللَّاتِ فَلْيَقُلْ لَا إِلَهَ إِلَّا اللهُ وَمَنْ قَالَ لِصَاحِبِهِ تَعَالَ أُقَامِرْكَ فَلْيَتَصَدَّقْ