A first wireless receives a message comprising one or more configuration parameters indicating: a number of a plurality of physical sidelink feedback channel (PSFCH) resources that are associated with a physical sidelink shared channel (PSSCH) transmission, and a period of the plurality of PSFCH resources, wherein a time interval of two consecutive PSFCH resources, of the plurality of PSFCH resources, is equal to the period of the plurality of PSFCH resources. The first wireless device transmits, to a second wireless device and via a first slot, a first PSSCH transmission. The first wireless device sends a hybrid automatic repeat request (HARQ) feedback based on at least one PSFCH reception in a first plurality of PSFCH resources, of the plurality of PSFCH resources, wherein the first plurality of PSFCH resources occur at least one slot after the first slot.