Sunan Abi Dawud, Hadith 3241

Narrated Abu Hurairah: The Messenger of Allah as saying: If anyone swears on oath is the course which he says: "By al-Lat" he should say: There is no god but Allah, and that if anyone says to his friend: Come and let me play for money with you, he should give something in charity (sadaqah).

حَدَّثَنَا الْحَسَنُ بْنُ عَلِيٍّ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنْ حُمَيْدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَنْ حَلَفَ فَقَالَ فِي حَلِفِهِ وَاللاَّتِ فَلْيَقُلْ لاَ إِلَهَ إِلاَّ اللَّهُ وَمَنْ قَالَ لِصَاحِبِهِ تَعَالَ أُقَامِرْكَ فَلْيَتَصَدَّقْ بِشَىْءٍ ‏" ‏ ‏.‏

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also referenced under: Hadith 3247 (DarusSalam)