helped. With His favour; there being no miscarriage now, as there had been in 1 Chronicles 13.
they offered. sacrificed. Hebrew. sabach. App-43. 2 Samuel 6:13 is complementary, not contradictory.
Related Commentaries of 1 Chronicles 15:26
1 Chronicles 15:26
26 And it came to pass, when God helped the Levites that bare the ark of the covenant of the LORD, that they offered seven bullocks and seven rams.