πηγή, -ῆς, ἡ
[in LXX chiefly for עַיִן, also for מָקוֹר, etc. ;]
a spring, fountain : Jas.3:11, 2Pe.2:17; τ. δάτων, Rev.8:10 14:7 16:4; of a well fed by a spring, Jhn.4:6; π. τοῦ αἵματος, of a flow of blood, Mrk.5:29; metaphorically, Jhn.4:14, Rev.7:17 21:6.†
(AS)