TgJ Jer22:4 :אֲרֵי אִם מִעבָד תַעבְדוּן יָת פִתגָמָא הָדֵין‏ : but rather you must do this thing
See the entire entry for ˀry conj. because, since

TgJ Jer22:4 :רְכִיבִין בִרתִיכִין וֻבסוּסָוָן‏ : mounted on chariots and horses
See the entire entry for rkb vb. to mount