TDN.134:1 :ܒܫܒܬܐ ܐܚܪܝܬܐ ܕܦܣܟܐ ܒܚܡܫܐ ܒܫܒܐ‏ : on Thursday of the last week of Passover
See the entire entry for šabbā{šubbā), šabbəṯā (šubbəṯā) n.f. sabbath; week