When mother Yaśodā was trying to bind the offending child, she saw that the binding rope was short by a distance the width of two fingers. Thus she brought another rope to join to it.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तद्दाम बध्यमानस्य स्वार्भकस्य कृतागसः । द्व्यङ्गुलोनमभूत्तेन सन्दधेऽन्यच्च गोपिका
taddāma badhyamānasya svārbhakasya kṛtāgasaḥ | dvyaṅgulonamabhūttena sandadhe'nyacca gopikā
SB 10.9.15