LXX 2 Macc 2:27

καθάπερ τῷ παρασκευάζοντι συμπόσιον, καὶ ζητοῦντι τὴν ἑτέρων λυσιτέλειαν, οὐκ εὐχερές· ὅμως διὰ τὴν τῶν πολλῶν εὐχαριστίαν ἡδέως τὴν κακοπάθειαν ὑποίσομεν·

And as to ourselves indeed, in undertaking this work of abridging, we have taken in hand no easy task; yea, rather a business full of watching and sweat.