Midrasch zu Schoftim 4:9

R. Phinehas said in the name of R. Reuben: Two people were principal actors and yet made themselves subordinate, viz. Abraham and Barak. Barak, as it is written, And she sent and called Barak . . . And Barak said unto her : If thou wilt go with me, then I will go ; but if thou wilt not go with me, I will not go (Judg. iv, 6 ff.). R. Judah explained : If thou wilt go with me to Kadesh, 3 I will go with thee against Hazor 4 ; whilst if thou wilt not go with me to Kadesh, I will not go with thee against Hazor. R. Nehemiah explained it: If thou wilt go with me in Song, 5 I will go with thee to battle; but if thou wilt not go with me in Song, I will not go with thee to battle. And she said; I will surely go with thee, notwithstanding (efes) the journey that thou takest shall not be for thy honour (ib. 9). R. Reuben said: [Efes] is a Greek word, as though to say hafes (let alone).* Said she to him: 'What thinkest thou? that the glory for the Song shall be given to thee alone!* He retired into the second place, as it is written, Then sang Deborah and Barak the son of Abinoam, etc. (ib, v, i). 2 [Translation 1939 Freedman and Simon, Soncino Press]