Plutarch. Plutarch's Lives of the Noble Grecians and Romans
Englished by Sir Thomas North. Trans. Sir Thomas North. Vol. 6 (1579; London: David Nutt, 1896) 220.

MARCUS    skorning this miserie and niggardlines, first of all mustered 
BRUTUS    his armie, and did purifie it in the fields, according to the 
    manner of the Romanes: and then he gave unto every 
    band a number of weathers to sacrifice, and fiftie silver 
    Drachmas to every souldier. So that Brutus and Cassius 
    souldiers were better pleased, and more coragiously bent to 
    fight at the daye of the battell, then their enemies souldiers 
Unlucky    were. Notwithstanding, being busily occupied about the 
signes unto    ceremonies of this purification, it is reported that there 
Cassius.    chaunced certaine unlucky signes unto Cassius. For one 
    of his Sergeaunts that caried the roddes before him, brought 
    him the garland of flowers turned backwards, the which 
    he should have worne on his head in the tyme of sacrificing. 
    Moreover it is reported also, that at another tyme before, 
    in certaine sportes and triumphe where they caried an image 
    of Cassius victorie of cleane gold, it fell by chaunce, the 
    man stumbling that caried it. And yet further, there were 
    seene a marvelous number of fowles of praye, that feede 
    upon dead carkasses: and beehives also were founde, where 
    bees were gathered together in a certaine place within the 
    trenches of the campe: the which place the Soothsayers 
    thought good to shut out of the precinct of the campe, 
    for to take away the superstitious feare and mistrust men 
    would have of it. The which beganne somewhat to alter 
    Cassius minde from Epicurus opinions, and had put the 
Cassius    souldiers also in a marvelous feare. Thereuppon Cassius 
and Brutus    was of opinion not to trye this warre at one battell, but 
opinions    rather to delay tyme, and to drawe it out in length, con- 
about battell.    sidering that they were the stronger in money, and the 
    weaker in men and armors. But Brutus in contrary manner, 
    did alway before, and at that tyme also, desire nothing 
    more, then to put all to the hazard of battell, assoone as 
    might be possible: to the ende he might either quickely 
    restore his contry to her former libertie, or rid him forth- 
    with of this miserable world, being still troubled in follow- 
    ing and mainteyning of such great armies together. But 
    perceiving that in the dayly skrrmishes and byckerings they 
    made, his men were alway the stronger, and ever had the 
    better: that yet quickned his spirits againe, and did put