וַיִּקָּ֥ר אֱלֹהִ֖ים אֶל־בִּלְעָ֑ם וַיֹּ֣אמֶר אֵלָ֗יו אֶת־שִׁבְעַ֤ת הַֽמִּזְבְּחֹת֙ עָרַ֔כְתִּי וָאַ֛עַל פָּ֥ר וָאַ֖יִל בַּמִּזְבֵּֽחַ׃
And God met Balaam; and he said unto Him: ‘I have prepared the seven altars, and I have offered up a bullock and a ram on every altar.’
Read halakhic rulings (Jewish law) on Numbers 23:4: and classical halakhic sources.