SB 10.54.37

asādhv idaṁ tvayā kṛṣṇa
 kṛtam asmaj-jugupsitam
vapanaṁ śmaśru-keśānāṁ
 vairūpyaṁ suhṛdo vadhaḥ
Word for word: 
asādhu — improperly; idam — this; tvayā — by You; kṛṣṇa — O Kṛṣṇa; kṛtam — done; asmat — for Us; jugupsitam — terrible; vapanam — the shaving; śmaśru-keśānām — of his mustache and hair; vairūpyam — the disfigurement; suhṛdaḥ — of a family member; vadhaḥ — death.
Translation: 
[Lord Balarāma said:] My dear Kṛṣṇa, You have acted improperly! This deed will bring shame on Us, for to disfigure a close relative by shaving off his mustache and hair is as good as killing him.
Purport: 

Omniscient Balarāma knew that Rukmī was the guilty party, but to encourage the lamenting Rukmiṇī He decided to gently reproach Śrī Kṛṣṇa