What is the ruling on someone who says the word "I bet you" without intending to gamble? Does this fall under the Hadith: "Whoever says to his brother, 'Come, I will bet you,' let him give something in charity"? And does the Hadith indicate obligation or recommendation?

The agreed-upon Hadith (definition), "Whoever says to his companion, 'Come, let me gamble with you,' let him give Sadaqah (definition) (charity)," means that charity becomes obligatory for the one who proposed gambling and intended to act upon it. Ibn Battal and Qadi Iyad are of the view that this charity is an expiation for his belief and intention. Scholars differed on whether this charity is obligatory or recommended. Some considered it obligatory, such as Al-Hattab and Al-Qurtubi, while others considered it recommended, such as Ibn Battal and As-Sindi. The more aرجh (preponderant) opinion is that it is obligatory. As for the amount of charity, some said it should be equivalent to what he would have gambled with, but the correct view is that it is not restricted to a specific amount; rather, one should give charity with whatever is easy for him.