הֵיכָל

From LSJ

νᾶφε καὶ μέμνασο ἀπιστεῖν → keep a clear head and remember not to believe a thing (Epicharmus fr. 250)

Source

English (Strong)

probably from יָכֹל (in the sense of capacity); a large public building, such as a palace or temple: palace, temple.