'Whether' in the Bible

Some Pharisees came up to Jesus, testing Him, and began to question Him whether it was lawful for a man to divorce a wife.

Therefore, be on the alert—for you do not know when the master of the house is coming, whether in the evening, at midnight, or when the rooster crows, or in the morning—

Someone ran and filled a sponge with sour wine, put it on a reed, and gave Him a drink, saying, “Let us see whether Elijah will come to take Him down.”

Pilate wondered if He was dead by this time, and summoning the centurion, he questioned him as to whether He was already dead.