Rasarnavasudhakara 3.78.p3

3.78.p3

rāmaḥ (vihasya) : jāmadagnya ! ekaḥ punar ayaṃ śastra-grahaṇādhikāro yad guruṣv api tiraskāraḥ (tatraiva kiñcit parastāt) ity antena bhārgava-rāghavayoḥ pūjya-viṣaya-krodhāpahnavārthaṃ hāsya-kathanān narma-dyutiḥ |

and ending with: Rāma (laughing): "O Jāmadagnya! This is indeed a unique privilege of taking up arms, that there is disrespect even toward elders!" (in that very place, slightly further on); this is flash of jest, since laughter is described in order to conceal anger toward respected persons on the part of Bhārgava and Rāghava.