yajusam
yajuṣām — of the Yajur Veda;
SB 1.4.21
yajuṣām — of all sacrifices;
SB 3.14.9
yajuṣām — of all sacrifices;
SB 4.1.6
yajuṣām — of the Yajur Veda;
SB 12.6.64-65