וַיְהִ֗י כִּ֧י צָעֲד֛וּ נֹשְׂאֵ֥י אֲרוֹן־יְהוָ֖ה שִׁשָּׁ֣ה צְעָדִ֑ים וַיִּזְבַּ֥ח שׁ֖וֹר וּמְרִֽיא׃
And it was so, that when they that bore the ark of the LORD had gone six paces, he sacrificed an ox and a fatling.
I Chronicles
And it was, G-d abetting the Levites, the bearers of the ark of the covenant of the L-rd, that they sacrificed seven bulls and seven rams.