Also see definition of "Labor" in Word Study
Study Dictionary
Labor
Labor [NAVE]
LABOR.Gen. 3:19; Ex. 20:9-11; Ex. 23:12; Ex. 34:21 Lev. 23:3. Lev. 19:13; Deut. 24:14, 15; Deut. 25:4 1 Cor. 9:9; 1 Tim. 5:18. Eccl. 5:12; Jer. 22:13; Mal. 3:5; Matt. 20:1-15; Luke 10:7; Acts 20:35; Eph. 4:28; 1 Thess. 4:11, 12; 2 Thess. 3:7-13; Jas. 5:4 See: Employee; Employer; Industry; Laziness; Master; Servant.
LABOR [ISBE]
LABOR - la'-ber (yeghia`, `amal; kopos): The word (noun and verb) denoting hard work or "toil" (thus in the Revised Version (British and American) of Dt 26:7; Josh 7:3; Rev 2:2) represents several Hebrew and Greek words, chiefly those above. Occasionally, as in Hab 3:17 (ma`aseh), it stands for "fruit of labor." Sometimes, in conjunction with "travail," it refers to childbirth (Gen 35:16,17, yaladh; compare 1 Thess 2:9; 2 Thess 3:8). Examples of the word in the ordinary sense are: of yeghia`, Gen 31:42; Job 39:11,16; Ps 128:2; of `amal, common in Eccl 1:3,8; 2:10,11,18, etc.; of kopos, 1 Cor 15:58 ("your labor is not vain," etc.); 1 Thess 1:3 ("work of faith and labor of love"; compare Heb 6:10); 1 Tim 5:17 ("labor in the word and in teaching").See WORK; SLAVERY.
James Orr
Also see definition of "Labor" in Word Study