Sefer Chasidim Siman 853
Can copy this into an AI, or connect the whole library to your assistant. For deeper learning, you can directly use the original seforim, sites, and apps.
כשאדם אוכל וצמא לשתות אם ידיו מלוכלכות יקנחם ואח"כ יברך וישתה דכתיב (תהלים קלד ב) שאו ידיכם קדש וברכו את ה':
Medieval Jewish mysticism, translated by Sholom Alchanan Singer. Northbrook, Ill. Whitehall Co., 1971
If one is thirsty or hungry while his hands are unclean he should first clean them and afterwards drink or eat as is written: "Lift your hands in holiness and bless Hashem".