TgJ 1K18:21 :עַד אִמַתִי אַתוּן פְלִיגִין לְתַרתֵין פַלגָוָן‏ : how long are you going to be divided into two factions?
See the entire entry for pā/a/elgū, pā/a/elgūṯā n.f. half