וַיּ֥וֹרֶד אֶת־הָעָ֖ם אֶל־הַמָּ֑יִם (ס) וַיֹּ֨אמֶר יְהוָ֜ה אֶל־גִּדְע֗וֹן כֹּ֣ל אֲשֶׁר־יָלֹק֩ בִּלְשׁוֹנ֨וֹ מִן־הַמַּ֜יִם כַּאֲשֶׁ֧ר יָלֹ֣ק הַכֶּ֗לֶב תַּצִּ֤יג אוֹתוֹ֙ לְבָ֔ד וְכֹ֛ל אֲשֶׁר־יִכְרַ֥ע עַל־בִּרְכָּ֖יו לִשְׁתּֽוֹת׃
So he brought down the people unto the water; and the LORD said unto Gideon: ‘Everyone that lappeth of the water with his tongue, as a dog lappeth, him shalt thou set by himself; likewise every one that boweth down upon his knees to drink.’
Read halakhic rulings (Jewish law) on Judges 7:5: and classical halakhic sources.