BG 2.32
यदृच्छया चोपपन्नं स्वर्गद्वारमपावृतम्। सुखिनः क्षत्रियाः पार्थ लभन्ते युद्धमीदृशम्
yadṛichchhayā chopapannaṁ swarga-dvāram apāvṛitam sukhinaḥ kṣhatriyāḥ pārtha labhante yuddham īdṛiśham
Blessed are the soldiers who find their opportunity; this opportunity has opened for thee the gates of heaven.
Translated by Shri Purohit Swami
Happy are the Kshatriyas, O Arjuna! who are called to fight in such a battle that comes of its own accord as an open door to heaven.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
yadṛichchhayā—unsought; cha—and; upapannam—come; swarga—celestial abodes; dvāram—door; apāvṛitam—wide open; sukhinaḥ—happy; kṣhatriyāḥ—warriors; pārtha—Arjun, the son of Pritha; labhante—obtain; yuddham—war; īdṛiśham—such