Shiva Purana
वासुदेवम्पूर्वभागे दक्षिणे चानिरुद्धकम् ॥ सौम्ये संकर्षणञ्चैव प्रद्युम्नम्पश्चिमे यजेत् ॥ १८ ॥
He shall worship Vāsudeva in the east; Aniruddha in the south; Saṃkarṣaṇa in the north and Pradyumna in the west.
english translation
vAsudevampUrvabhAge dakSiNe cAniruddhakam ॥ saumye saMkarSaNaJcaiva pradyumnampazcime yajet ॥ 18 ॥
hk transliteration by Sanscript