Numbers 16:31

16:31 When he had finished speaking all these words, the ground that was under them split open,

Numbers 19:15

19:15 And every open container that has no covering fastened on it is unclean.

tn The initial temporal clause is standard: It begins with the temporal indicator “and it was,” followed here by the Piel infinitive construct with the preposition and the subjective genitive suffix. “And it happened when he finished.”

tn The infinitive construct with the preposition lamed (ל) functions here as the direct object of the preceding infinitive. It tells what he finished.