Is what was stated regarding the indication of the lines in the palm of the hand (18 and 81) as to the number of the Most Beautiful Names of Allah (99), and the age of Prophet Muhammad (peace and blessings be upon him) (63) when they are subtracted, and the connection of this to the virtue of licking the hand after eating to facilitate digestion and prevent sluggishness, correct?

It cannot be definitively stated that the secret in the lines of the hand is a symbol for numbers, due to the lack of conclusive evidence for it. If this were understood through the ijtihad (definition) (independent reasoning) of someone who knows the Indian numerical system, what would be understood by someone who writes numbers in other languages or by previous nations? Cosmic signs are understandable to all people, and the Quran and Sunnah (definition) provide sufficient guidance without the need for elaborating on this matter. A Muslim should rely on what is in the revelation, as it is the clearest, most correct, and most reliable evidence, and the revelation is a conclusive proof. As for these matters, they might be exploited by those who criticize Islam. Regarding licking fingers, its rulings have been clarified in previous fatwas. What has been mentioned about this matter needs to be reviewed by specialists in medical affairs to confirm it before stating it as fact.