The first five lines are:
Hear the sledges with the bells -
What a world of merriment their melody foretells!
How they tinkle, tinkle, tinkle,
In the icy air of night!
The words bells and tinkle are repeated. The real repetition happens in line 12-14:
From the bells, bells, bells, bells,
Bells, bells, bells -
From the jingling and the tinkling of the bells.