Strong's Greek #4526 - σάκκος, ου, ὁ sakkos (sackcloth)

sackcloth.

Of Hebrew origin (saq); "sack"-cloth, i.e. Mohair (the material or garments made of it, worn as a sign of grief) -- sackcloth.

see HEBREW saq

Strong's 4526: σάκκος

σάκκος (Attic σάκος), σάκκου, ὁ, Hebrew שַׂק (cf. Fremdwörter, under the word), a sack (Latinsaccus) i. e.

a. a receptacle made for holding or carrying various things, as money, food, etc. (; Leviticus 11:32).

b. a coarse cloth (Latincilicium), a dark coarse stuff made especially of the hair of animals (A. V. sackcloth): Revelation 6:12; a garment of the like material, and clinging to the person like a sack, which was usually worn (or drawn on over the tunic instead of the cloak or mantle) by mourners, penitents, suppliants, Matthew 11:21; Luke 10:13, and also by those who, like the Hebrew prophets, led an austere life, Revelation 11:3 (cf. what is said of the dress of John the Baptist, Matthew 3:4; of Elijah, 2 Kings 1:8). More fully in Winers RWB under the word Sack; Roskoff in Schenkel 5:134; (under the word in B. D.; also in McClintock and Strong. (From Herodotus down.))

Strong's Greek: 4526. σάκκος (sakkos) — 4 Occurrences

Matthew 11:21 - N-DMS
GRK: ἂν ἐν σάκκῳ καὶ σποδῷ
NAS: long ago in sackcloth and ashes.
KJV: long ago in sackcloth and ashes.
INT: anyhow in sackcloth and ashes

Luke 10:13 - N-DMS
GRK: ἂν ἐν σάκκῳ καὶ σποδῷ
NAS: sitting in sackcloth and ashes.
KJV: sitting in sackcloth and ashes.
INT: anyhow in sackcloth and ashes

Revelation 6:12 - N-NMS
GRK: μέλας ὡς σάκκος τρίχινος καὶ
NAS: black as sackcloth [made] of hair,
KJV: black as sackcloth of hair, and
INT: black as sackcloth hair and

Revelation 11:3 - N-AMP
GRK: ἑξήκοντα περιβεβλημένοι σάκκους
NAS: days, clothed in sackcloth.
KJV: days, clothed in sackcloth.
INT: [and] sixty clothed in sackcloth