And when they that carried the ark of the Lord had gone six paces, he sacrificed and ox and a ram:

when they

Numbers 4:15 And when Aaron and his sons have wrapped up the sanctuary and the vessels thereof at the removing of the camp, then shall the sons of Caath enter in to carry the things wrapped up: and they shall not touch the vessels of the sanctuary, lest they die. These are the burdens of the sons of Caath: in the tabernacle of the covenant:

Numbers 7:9 But to the sons of Caath he gave no wagons or oxen: because they serve in the sanctuary and carry their burdens upon their own shoulders.

Joshua 3:3 And began to proclaim: When you shall see the ark of the covenant of the Lord your God, and the priests of the race of Levi carrying it, rise you up also, and follow them as they go before:

1 Chronicles 15:2,15,25,26 Then David said: No one ought to carry the ark of God, but the Levites, whom the Lord hath chosen to carry it, and to minister unto himself for ever. . . .

oxen

1 Kings 8:5 And king Solomon, and all the multitude of Israel, that were assembled unto him, went with him before the ark, and they sacrificed sheep and oxen, that could not be counted or numbered.

2 Chronicles 5:6 And king Solomon and all the assembly of Israel and all that were gathered together before the ark, sacrificed rams, and oxen without number: so great was the multitude of the victims.