BT MQ 25a(45) :יומא חד איתפיכא ליה רצועה דתפילי‏ : one day the strap of his phylacteries got reversed
See the entire entry for ˀpk vb. to turn around

BT MQ 25a(45) :
See the entire entry for qrē, qeryā n.m. incident; contest