Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform a listen-before-talk (LBT) process for a multi-slot resource that includes a plurality of consecutive slots. The UE may transmit, based at least in part on the LBT process, a first transport block within a slot of the multi-slot resource in accordance with a first sidelink grant that includes the multi-slot resource. The UE may assign one or more other slots of the multi-slot resource to a second sidelink grant for transmitting a second transport block. Numerous other aspects are described.