Shiva Purana
ज्येष्ठाय नम इत्युक्त्वा शुभ्रवस्त्रम्प्रकल्पयेत्॥ श्रेष्ठाय नम इत्युक्त्वा दद्याद्यज्ञोपवीतकम् ॥ ७३ ॥
He shall offer a fresh piece of cloth saying Jyeṣṭhāya Namaḥ” (obeisance to the eldest). He shall offer the sacred thread saying Śreṣṭhāya Namaḥ (obeisance to the most excellent).
english translation
jyeSThAya nama ityuktvA zubhravastramprakalpayet॥ zreSThAya nama ityuktvA dadyAdyajJopavItakam ॥ 73 ॥
hk transliteration by Sanscript